Wine Terms A–Z

Assemblage is the French term for the art of blending different grape varieties, vineyard parcels, or barrel lots to create a final wine. It is a defining skill in regions like Bordeaux and Champagne, where the winemaker's ability to compose a harmonious blend determines quality.

Acidity in wine refers to the presence of natural organic acids — primarily tartaric, malic, and citric — that give wine its freshness, crispness, and ability to age. Acidity is essential for balance, food pairing, and the overall liveliness of a wine on the palate.

Aeration is the deliberate exposure of wine to air to trigger oxidative chemical reactions that soften tannins, dissipate off-putting aromas, and help the wine express a broader range of flavours. It can be achieved through decanting, swirling, or using an aerating device.

An appellation is a legally defined and protected geographical region for wine production. Appellations guarantee that a wine comes from a specific place and was made according to local regulations governing grape varieties, yields, winemaking methods, and quality standards.

AOC (Appellation d'Origine Contrôlée) and its EU equivalent AOP (Appellation d'Origine Protégée) is the French system of legally protected geographical designations for wine. It is the world's oldest and most imitated appellation system, establishing rules for origin, grape varieties, yields, and winemaking practices.

AVA (American Viticultural Area) is the United States' system for defining grape-growing regions based on distinguishing geographic features like climate, soil, elevation, and physical boundaries. Unlike European appellations, AVAs do not regulate grape varieties, yields, or winemaking methods.

An amphora is an ancient clay vessel used for fermenting and aging wine, dating back over 8,000 years to the Caucasus region. Once ubiquitous in Greek and Roman winemaking, amphorae have been revived by natural and artisanal winemakers seeking a neutral vessel that adds texture without oak-derived flavours.

Biodynamic viticulture is a holistic farming system based on the teachings of Rudolf Steiner (1924) that treats the vineyard as a self-sustaining organism. It goes beyond organic farming by incorporating cosmic rhythms, herbal preparations, and composting practices to enhance soil vitality and vine balance.

Botrytis cinerea, known as noble rot (pourriture noble), is a beneficial fungus that desiccates ripe grapes, concentrating their sugars, acids, and flavours. It is responsible for the world's greatest sweet wines, including Sauternes, Tokaji Aszú, and German Trockenbeerenauslese.

Body describes the weight and fullness of a wine on the palate, ranging from light to full. It is primarily determined by alcohol level, residual sugar, and extract (dissolved solids), and is one of the most important characteristics when pairing wine with food.

Bouquet refers to the complex aromas that develop in wine through aging, as opposed to primary fruit aromas from the grape itself. These secondary and tertiary aromas include notes of leather, tobacco, earth, mushroom, and dried fruits that emerge with bottle maturation.

Bâtonnage is the French term for lees stirring — the practice of agitating the dead yeast cells (lees) that settle at the bottom of a barrel or tank after fermentation. This technique enriches a wine's texture, adding creaminess, body, and complexity, and is most associated with premium white Burgundy and Muscadet sur lie.

A barrique is a small oak barrel holding approximately 225 litres (59 US gallons), originating in Bordeaux and now the world's most widely used barrel format for aging fine wine. Its high surface-to-volume ratio maximises oak influence and micro-oxygenation, making it the standard vessel for premium red and white wines globally.

Brut is a sweetness classification for Champagne and sparkling wine indicating a dry style with less than 12 grams of residual sugar per litre. It is by far the most popular sparkling wine category globally, accounting for the vast majority of Champagne production and serving as the benchmark style for quality sparkling wine worldwide.

Brettanomyces (commonly called Brett) is a genus of wild yeast that can colonise wine during aging, producing distinctive aromas variously described as barnyard, leather, Band-Aid, horse blanket, or smoky spice. Whether Brett constitutes a fault or a desirable complexity is one of winemaking's most polarising debates.

Cuvée is a French term that broadly means a specific blend or batch of wine. In Champagne, it refers to the first and finest pressing of grapes; more generally, it denotes a winemaker's selected blend, often their premium bottling.

Chaptalisation is the winemaking practice of adding sugar to grape must before fermentation to increase the final alcohol level. Named after French chemist Jean-Antoine Chaptal, it is commonly used in cool-climate regions where grapes may not reach sufficient natural ripeness.

Carbonic maceration is a winemaking technique where whole, uncrushed grapes ferment inside a sealed tank filled with carbon dioxide. It produces fruity, low-tannin red wines with distinctive banana and bubblegum aromas. It is the signature method of Beaujolais Nouveau.

In viticulture, a clone is a genetically identical copy of a specific grapevine selected for desirable characteristics such as smaller berries, disease resistance, or flavour intensity. Clonal selection is a key tool for improving vineyard quality.

Cru is a French term meaning 'growth' or 'vineyard' that designates a recognised quality level in wine classification. It denotes a specific vineyard or estate whose terroir produces wines of exceptional quality, particularly in Bordeaux, Burgundy, Champagne, and Beaujolais.

A climat is a precisely delineated vineyard parcel in Burgundy, defined by its unique combination of soil, microclimate, slope, and exposure. The climats of Burgundy were inscribed as a UNESCO World Heritage Site in 2015, recognising their historical and cultural significance.

A corked wine is one contaminated by TCA (2,4,6-trichloroanisole), a chemical compound that produces musty, damp cardboard aromas and strips the wine of its fruit character. Cork taint affects an estimated 2-5% of wines sealed with natural cork.

A cooperage is a workshop where coopers craft and repair wooden barrels (casks) used for wine aging. The art of cooperage involves selecting oak, splitting or sawing staves, shaping them with fire and water, and assembling them into watertight barrels — a skill virtually unchanged for centuries.

Cru Classé (classified growth) refers to a wine estate that has been officially ranked within one of France's hierarchical classification systems. The most famous is the 1855 Bordeaux Classification, but several other French regions maintain their own cru systems, each reflecting historical prestige and perceived quality.

Cru Bourgeois is a quality classification for châteaux in the Médoc region of Bordeaux that were not included in the 1855 Classification. Revived in 2020 with a transparent, three-tier hierarchy, it now encompasses 249 estates and represents some of Bordeaux's best value wines.

In Bordeaux wine terminology, a château is a wine estate that encompasses vineyards, winemaking facilities, and typically a residence. The term implies a self-contained production unit where grapes are grown and vinified on the property, though the building need not be a literal castle.

A cave coopérative is a winery collectively owned by its member grape growers, who pool their harvests and resources for vinification, aging, and marketing. Cooperatives produce roughly 40% of all French wine and play a vital role in regions where small-scale independent winemaking would be economically unviable.

A cold soak (also called cold maceration) is a pre-fermentation technique in which crushed grapes are held at low temperatures, typically 4-10°C, for several days before fermentation begins. This aqueous extraction favours colour and fruit-forward aromatic compounds while limiting harsh tannin extraction.

Decanting is the process of pouring wine from its bottle into a separate vessel (decanter) to separate it from sediment and expose it to oxygen. This enhances aromas, softens tannins, and allows the wine to open up and express its full potential.

DOC (Denominazione di Origine Controllata) and DOCG (Denominazione di Origine Controllata e Garantita) are Italy's quality wine classification levels. DOCG is the highest tier, requiring stricter production rules, lower yields, and mandatory government tasting panels before release.

A decanter is a glass vessel, typically with a wide base and narrow neck, used to aerate wine and separate it from sediment. The shape maximises the wine's contact with air, allowing it to breathe and release its full aromatic potential before serving.

Débourbage is the settling and clarification of grape must (juice) before fermentation begins, primarily used in white and rosé winemaking. By allowing solids — grape skin fragments, pulp, and other debris — to fall to the bottom of a tank, the winemaker obtains cleaner juice that ferments into a more precise, aromatic wine.

Dosage is the addition of a small amount of sweetened wine, called the liqueur d'expédition, to a sparkling wine after disgorgement. This final adjustment determines the wine's sweetness level and is one of the most defining stylistic choices in Champagne and traditional-method sparkling wine production.

Dégorgement (disgorgement) is the process of removing the plug of dead yeast cells from the neck of a sparkling wine bottle after riddling. It is a critical step in the traditional method (méthode champenoise) that transforms a cloudy, yeast-laden bottle into a brilliantly clear sparkling wine ready for dosage and final corking.

A domaine is a French wine estate where the proprietor grows grapes and produces wine entirely from their own vineyards. The term is most closely associated with Burgundy, where domaine-bottled wines represent the pinnacle of terroir expression, but it is used across all French wine regions.

Demi-sec is a French wine classification meaning literally half-dry, indicating a semi-sweet wine style. In Champagne, demi-sec contains 32-50 grams per litre of residual sugar, while for Loire Valley still wines like Vouvray, it designates an off-dry to medium-sweet style that balances sweetness with vibrant acidity.

Dry farming is a viticultural practice in which grapevines are grown without supplemental irrigation, relying entirely on natural rainfall and soil moisture reserves. Advocates argue that dry-farmed vines produce more concentrated, terroir-expressive wines as roots are forced to dig deep into the subsoil in search of water.

En primeur (also called wine futures) is the practice of buying wine while it is still aging in barrel, typically 18-24 months before bottling and delivery. This system, centred on Bordeaux, allows buyers to secure allocations of top wines at release prices before they enter the secondary market.

Fermentation is the biochemical process in which yeast converts grape sugars (glucose and fructose) into alcohol and carbon dioxide. It is the fundamental transformation that turns grape juice into wine and is the single most important step in winemaking.

Fining is a winemaking process that removes unwanted particles, haze, and off-flavours by adding a fining agent that binds to impurities and settles them out of the wine. Common agents include bentonite clay, egg white, and casein.

The finish (or length) of a wine is the persistence of flavour and sensation that remains in the mouth after swallowing. A long, complex finish is a hallmark of high-quality wine, with great wines leaving impressions that linger for 30 seconds or more.

Fortified wine is wine to which a distilled spirit, typically grape brandy, has been added during or after fermentation. This technique raises the alcohol level to 15-22% ABV and can arrest fermentation to retain natural sweetness, producing iconic styles including Port, Sherry, Madeira, and Vin Doux Naturel.

Filtration is the process of passing wine through a filter medium to remove suspended particles — yeast cells, bacteria, proteins, and other solids — to achieve visual clarity and microbiological stability. It is a common but debated practice, with natural winemakers arguing it strips flavour and texture.

Grand Cru ('great growth') is the highest quality classification for vineyards in French wine, designating plots that consistently produce the finest wines. In Burgundy, only 33 vineyards out of thousands hold Grand Cru status, representing less than 2% of total production.

Garrigue is a tasting term borrowed from the Mediterranean landscape, describing the aromatic profile of wild herbs, dried flowers, and sun-baked earth found in wines from Southern France and other Mediterranean climates. It evokes thyme, rosemary, lavender, juniper, cistus, and fennel — the scrubland vegetation that surrounds many southern vineyards.

A horizontal tasting compares wines from different producers or vineyards within the same vintage year. This format highlights how terroir, winemaking style, and producer philosophy create different expressions from the same growing season.

IGP (Indication Géographique Protégée) is the EU quality tier sitting below AOP/AOC, offering winemakers greater flexibility in grape varieties, yields, and winemaking techniques while still guaranteeing regional origin. In France, IGP replaced the former Vin de Pays designation in 2009 and now covers more than 75 production zones.

A Jeroboam is a large-format wine bottle whose volume varies by region: 3 litres (4 standard bottles) in Bordeaux, or 4.5 litres (6 standard bottles) in Champagne and Burgundy. Named after a biblical king of Israel, Jeroboams are prized for celebrations and long-term cellaring.

Lees are the sediment of dead yeast cells, grape fragments, and other particles that settle at the bottom of a wine vessel after fermentation. Aging wine on its lees (sur lie) adds body, creaminess, and complexity — a technique especially prized in Champagne and Muscadet production.

Legs (also called tears or curtains) are the droplets of wine that form and slowly trickle down the inside of a glass after swirling. They are caused by the Gibbs-Marangoni effect — a surface tension phenomenon — and primarily indicate the wine's alcohol and sugar content, not quality.

A lieu-dit is a named vineyard site or parcel of land identified by a traditional topographical or historical name. Common throughout French wine regions, lieux-dits preserve centuries of local geographic knowledge and increasingly appear on labels as markers of terroir specificity.

Malolactic fermentation (MLF) is a secondary fermentation process in which tart malic acid is converted into softer lactic acid by lactic acid bacteria. This process reduces acidity, adds body, and often produces buttery, creamy flavours — particularly noticeable in Chardonnay.

Maceration is the winemaking process in which grape skins, seeds, and sometimes stems soak in grape juice to extract colour, tannins, and flavour compounds. The duration and technique of maceration fundamentally shape a wine's body, structure, and aromatic complexity.

Must is the freshly pressed grape juice that contains the skins, seeds, and stems before or during fermentation. It is the raw material of winemaking — everything that comes from the crush before yeast transforms the sugars into alcohol.

Minerality is a widely used but debated tasting term that describes flavours and textures reminiscent of wet stones, chalk, flint, slate, or salinity in wine. Often associated with terroir-driven wines from stony soils, the exact mechanism behind minerality remains scientifically unresolved.

A magnum is a wine bottle holding 1.5 litres — exactly twice the volume of a standard 750ml bottle. Magnums are prized by collectors because the larger format allows wine to age more slowly and gracefully, often producing superior results after decades of cellaring.

Méthode champenoise, also called the traditional method (méthode traditionnelle), is the process of making sparkling wine by inducing a second fermentation inside the bottle. This labour-intensive technique produces the finest, most complex sparkling wines in the world, including Champagne, Crémant, Cava, and Franciacorta.

A monopole is a vineyard wholly owned by a single producer, a rarity in regions like Burgundy where centuries of inheritance law have fragmented most vineyards among dozens of proprietors. Monopole status guarantees a singular expression of terroir uncompromised by stylistic differences between multiple owners.

Micro-oxygenation (micro-ox) is a winemaking technique that introduces tiny, controlled amounts of oxygen into wine through a porous ceramic diffuser, simulating the slow oxygen exchange that occurs during barrel aging. Developed in Madiran in the 1990s, it softens tannins and stabilises colour in tank-aged wines.

The nose of a wine is its aromatic profile as perceived by smelling — both before and after swirling the glass. Evaluating the nose is the second step in professional wine tasting and can reveal a wine's grape variety, origin, age, and winemaking techniques.

A négociant is a wine merchant who purchases grapes, juice, or finished wine from multiple growers and produces wine under their own label. Négociants play a vital role in regions like Burgundy, the Rhône Valley, and Bordeaux, where vineyard ownership is fragmented among many small producers.

Oak aging is the practice of maturing wine in oak barrels to add flavour complexity, improve texture, and allow controlled oxygen exposure. Oak imparts notes of vanilla, toast, spice, and coconut while softening tannins through micro-oxygenation.

Old vines (vieilles vignes in French) are grapevines that have reached an advanced age, typically 35 years or more, though there is no legal definition. Old vines produce smaller yields of more concentrated grapes, resulting in wines with greater depth, complexity, and intensity.

Ouillage is the practice of topping up wine barrels to replace liquid lost to evaporation, keeping them completely full to minimise the wine's exposure to oxygen. Without regular ouillage, the air space (ullage) in a barrel promotes oxidation and the growth of spoilage organisms such as acetobacter.

Oxidative aging is a winemaking approach that deliberately exposes wine to controlled amounts of oxygen during maturation, producing nutty, amber-hued, and complex flavours. It is the defining technique behind styles such as Sherry, Vin Jaune from the Jura, and traditional Rioja reserva wines.

Oenology (also spelled enology) is the science and study of winemaking, encompassing every aspect from grape chemistry and fermentation biochemistry to aging, blending, and bottling. Distinct from viticulture, which covers grape growing, oenology focuses on what happens after the grapes reach the winery.

The palate is the taste and tactile experience of wine in the mouth, encompassing flavours, texture, structure, and balance. Wine professionals use 'palate' to describe both the physical evaluation of a wine and a taster's developed ability to discern quality.

Phylloxera is a microscopic root-feeding louse (Daktulosphaira vitifoliae) native to North America that devastated European vineyards in the late 19th century. It destroyed approximately 70% of Europe's vineyards and permanently changed viticulture by making rootstock grafting a necessity.

Premier Cru ('first growth') is the second-highest vineyard classification in Burgundy, designating excellent vineyard sites that sit just below Grand Cru. In Bordeaux, confusingly, Premier Cru is the highest classification, referring to the top five estates of the 1855 Classification.

Pigeage, or punch-down, is a winemaking technique in which the cap of grape skins, seeds, and stems that rises to the surface during red wine fermentation is manually or mechanically pushed back into the fermenting juice. This maximises extraction of colour, tannin, and flavour while preventing the cap from drying out and harbouring spoilage bacteria.

Pressurage is the pressing of grapes or grape must to extract juice, a critical step that determines the quality, clarity, and style of the finished wine. The method of pressing — gentle or firm, whole-cluster or destemmed — and the separation of free-run juice from press fractions profoundly influence a wine's tannin profile and purity.

A qvevri (also spelled kvevri) is a large, egg-shaped clay vessel traditionally used in Georgia for fermenting and aging wine, buried underground up to the neck. Georgian qvevri winemaking is recognised by UNESCO as Intangible Cultural Heritage of Humanity and represents the world's oldest continuous winemaking tradition.

Racking is the process of transferring wine from one vessel to another, leaving behind the sediment (lees) that has settled at the bottom. This clarification technique removes unwanted particles and exposes the wine to small amounts of oxygen, aiding its development.

Residual sugar (RS) is the natural grape sugar remaining in wine after fermentation is complete. It determines whether a wine tastes dry, off-dry, or sweet. Most dry wines contain less than 4 g/L of residual sugar, while sweet wines can exceed 100 g/L.

Rootstock is the root system onto which a grapevine variety is grafted. Since the phylloxera crisis of the 19th century, nearly all vines worldwide are grafted onto American rootstock species that are naturally resistant to the phylloxera louse.

Remontage, or pump-over, is a winemaking technique where fermenting juice is drawn from the bottom of a tank and pumped over the cap of grape skins floating on top. It is the dominant extraction method in Bordeaux and many New World wineries, offering controlled, even extraction of colour and tannin.

Remuage (riddling) is the process of gradually tilting and rotating sparkling wine bottles to collect yeast sediment in the neck for disgorgement. Traditionally performed by hand over several weeks, modern production increasingly relies on automated gyropalettes that complete the process in days.

A Récoltant-Manipulant (RM) is a Champagne grower who cultivates their own vineyards and produces Champagne entirely from their own grapes on their own premises. The RM code on a Champagne label distinguishes grower-made Champagne from that of large négociant houses.

Reserve (or Reserva/Riserva) is a wine label term indicating a higher quality or longer aging period, though its legal definition varies dramatically by country. In Spain and Italy, reserve designations are strictly regulated with mandatory aging requirements, while in countries like the United States and Australia, the term has no legal meaning whatsoever.

Sulfites (sulphur dioxide / SO₂) are a preservative used in winemaking to prevent oxidation and inhibit unwanted microbial activity. Nearly all wines contain some sulfites — both naturally occurring from fermentation and added by the winemaker — and they are essential for wine stability and longevity.

A sommelier is a trained wine professional who specialises in wine service, food and wine pairing, and cellar management in fine dining restaurants. Sommeliers guide guests through wine lists, recommend pairings, and ensure wines are served at proper temperatures and in correct glassware.

Saignée (literally 'bleeding') is a winemaking technique where a portion of juice is bled off from a tank of crushed red grapes early in maceration. The bled juice is fermented separately to make rosé, while the remaining must — now more concentrated in skins relative to juice — produces a deeper, more intense red wine.

A second wine is a secondary label produced by a prestigious wine estate, typically in Bordeaux, using lots that were not selected for the estate's flagship grand vin. Second wines offer an accessible entry point to a top château's style at a significantly lower price.

Skin contact refers to the period during which grape juice remains in contact with grape skins, extracting colour, tannins, and aromatic compounds. While essential in red winemaking, extended skin contact with white grapes is the defining technique behind orange wine, one of the fastest-growing categories in modern winemaking.

Sec is the French word for dry, used on wine labels to indicate a wine with little or no perceptible residual sugar. Confusingly, in the Champagne sweetness scale, Sec actually designates a medium-sweet style (17-32 g/L sugar), reflecting historical labelling conventions from an era when Champagne was routinely much sweeter.

Sur lie is a French winemaking term meaning on the lees, referring to the practice of aging wine in contact with its spent yeast cells after fermentation. This technique enriches wine with body, creaminess, and complex bread-dough or brioche notes, and is the defining character of Muscadet and an essential element of Champagne production.

Terroir refers to the complete natural environment in which a wine is produced, including soil, climate, topography, and surrounding vegetation. It is the French concept that explains why wines from different places taste unique, even when made from the same grape variety.

Tannins are naturally occurring polyphenolic compounds found in grape skins, seeds, and stems that give red wine its structure, astringency, and aging potential. They create a drying sensation on the palate and are essential to a wine's ability to develop complexity over time.

Ullage is the air space between the wine's surface and the closure (cork or capsule) in a bottle. In aging wines, ullage increases as tiny amounts of wine evaporate through the cork over decades. The level of ullage is a key indicator of a wine's condition and proper storage history.

A vintage refers to the year in which the grapes for a wine were harvested. It indicates the specific growing season and weather conditions that shaped the grapes, making it a critical factor in wine quality, style, and aging potential.

A varietal wine is one labelled by its dominant grape variety (e.g., Chardonnay, Merlot, Riesling). The term also refers to the grape variety itself. Varietal labelling is the standard approach in New World wine regions, while Old World wines are traditionally named by place.

A vertical tasting is a comparative tasting of the same wine from a single producer across multiple vintages. This format reveals how vintage variation, aging, and winemaker evolution affect a wine over time, making it one of the most educational and revealing tasting formats.

Vendange is the French term for the grape harvest, encompassing everything from picking decisions to grape transport to the winery. Harvest timing is the single most consequential viticultural decision, as it determines the balance of sugar, acidity, and phenolic ripeness in the finished wine.

A vigneron is a French term for a winegrower who cultivates vines and typically produces wine from their own estate-grown grapes. Unlike a négociant who buys grapes or wine from others, the vigneron embodies the direct connection between land, vine, and bottle — the essence of terroir-driven winemaking.

Vin de France is the most basic official wine category in France, replacing the former Vin de Table designation in 2009. It permits blending grapes from any region in the country and places almost no restrictions on grape varieties, yields, or winemaking techniques.

Volatile acidity (VA) refers to the steam-distillable acids in wine, primarily acetic acid, which at elevated levels produces an unpleasant vinegar-like aroma and sharp, pungent taste. While trace amounts of VA are a normal byproduct of fermentation and can add complexity, concentrations above sensory thresholds are considered a wine fault.

Viticulture is the science, study, and practice of grape growing, encompassing all vineyard management decisions from planting and trellising to pruning, canopy management, pest control, and harvest timing. It is the agricultural foundation upon which all winemaking rests, and vineyard quality is widely regarded as the single greatest determinant of wine quality.

Whole-cluster fermentation is a winemaking technique in which entire grape bunches — stems included — are added to the fermenting vat rather than being destemmed. This ancestral method adds aromatic complexity, structural tannins, and spice notes, and has become a defining stylistic choice in Burgundy and Oregon Pinot Noir.

Élevage (literally "raising" or "upbringing" in French) refers to the entire process of maturing wine between fermentation and bottling. It encompasses barrel aging, racking, fining, blending, and all cellar decisions that shape the final wine.