The New World of American Wines
Even though the United States produced wine commercially in the nineteenth century, the U.S. wine industry made it big only beginning in the 1970s. Prohibition from 1920 to 1933, the Great Depression, and WWII were serious blows to the wine business — and recovery was slow.
Before 1970, only a few dozen operating wineries existed in California; today, the state has well over 800 bonded wineries (about a dozen or so giants, but mainly small, family-owned operations). California’s growth has stimulated interest in wine all across the country.
Wineries exist in all 50 states, but wine production is an important industry in only four states:
The United States currently is fourth in world wine production — although well behind the two leaders, Italy and France. (Spain is a distant third.)
Homegrown ways
The wines of the United States — especially California — are the essence of New World wine-think. Winemakers operate freely, planting whatever grape variety they wish, wherever they wish to plant it. They blend wines from different regions together as they wish. (Blending among states is trickier, because of federal rules.)
Until California began naming wines after grapes, Chardonnay, Merlot, Pinot Noir, and Cabernet Sauvignon were just behind-the-scenes ingredients of wine — but now they are the wine. Lest anyone think that all wines from a particular grape are the same, however, winemakers have emerged as celebrities who put their personal spin on the best wines. In the California scenario especially, the land — the terroir — has been secondary, at least until recently.
American winemakers have embraced technology in their efforts to create wines that taste like fruit. California’s two important universities for winemaking — California State University at Fresno and, especially, the University of California at Davis — have become world leaders in the scientific study of wine. Even European winemakers make pilgrimages to California to study at U.C. Davis.
Playing by their own rules
An appellation system for wines does exist in the United States, and like the classic French model, the country defines various vineyard regions. But the U.S. system of American Viticultural Areas (AVAs) establishes only the geographical boundaries of wine zones; it doesn’t stipulate which grape varieties can be planted, the maximum yield of grapes per acre, or anything else that would link the geography to a particular style of wine. AVA names, the names of the regions of production, therefore have secondary importance on wine labels after the name of the grape.
Wines labeled with the name of a grape variety in the United States must contain at least 75 percent of that grape variety, according to federal law. Wines with an AVA indication must be made at least 85 percent from grapes from that viticultural area. Wines with vintage years must derive at least 85 percent from the named vintage.

Wine Glossary
American Viticultural Area; AVA
In the United States, a term that defines the geographical boundaries of a specific wine zone or region. For example, Napa Valley is the name of the AVA within Napa County.

Wine Glossary
AOC
An acronym for Appellation d’Origine Contrôlée (the shortened form is Appellation Contrôlée, or AC). AOC is a classification relating to the quality of a wine produced in the European Union (EU).

Wine Glossary
AOQS
An acronym for Appellation d’Origine de Qualité Supérieure. AOQS is a classification relating to the quality of a wine produced in the European Union (EU); in this case, refers to a wine of superior quality.

Wine Glossary
appellation
In the European Union, a registered place name listed on a wine label that indicates the origin of the wine. Sometimes called appellation of origin.

Wine Glossary
aroma
A wine descriptor that refers to how a wine smells.

Wine Glossary
balance
A standard that wine experts use to judge wine quality; the relationship of four components (acidity, sweetness, tannin, and alcohol) to each other.

Wine Glossary
body
A wine descriptor that explains how heavy a wine feels in your mouth (often related to the alcohol content). Wines are often described as light-bodied, medium-bodied, or full-bodied.

Wine Glossary
bouquet
A wine descriptor that refers to how a (typically well-aged) wine smells.

Wine Glossary
complexity
A standard that wine experts use to judge wine quality; refers to a characteristic of a wine that has multiple flavors and aromas (usually a better quality wine).

Wine Glossary
crisp
A wine descriptor that refers to a wine with refreshing (typically high) acidity.

Wine Glossary
decanter
A glass container that can hold the contents of an entire bottle of wine; often used to aerate the wine (let it breathe before consuming).

Wine Glossary
depth
A standard that wine experts use to judge wine quality; indicates a wine that gives the impression of having many layers (rather than being "flat" tasting).

Wine Glossary
DO
An acronym for Denominação de Origen. DO is Portugal’s highest quality ranking for their wines.

Wine Glossary
DOC
An acronym for Denominazione di Origine Controllata. DOC is a classification referring to a quality wine produced in Italy.

Wine Glossary
DOCG
An acronym for Denominazione di Origine Controllata e Garantita. DOCG is a classification relating to a small group of elite (high-quality) wines produced in Italy.

Wine Glossary
dry
A wine descriptor that refers to a wine that is not sweet. Wines can be classified as dry, off-dry (or semi-sweet), or sweet.

Wine Glossary
fermentation
The process (during winemaking) in which yeasts convert the sugars in a grape juice to alcohol and carbon dioxide.

Wine Glossary
finish
A wine descriptor that refers to the impression a wine leaves in your mouth after you taste and swallow it (the aftertaste). A standard used to judge wine quality.

Wine Glossary
flavor intensity
A wine descriptor that refers to how strong or weak a wine's flavors are.

Wine Glossary
fruity
A wine descriptor that refers to a wine that has aromas and flavors that suggest fruit.

Wine Glossary
IGT
An acronym for Indicazione di Geografica Tipica. IGT is a table wine classification for Italian wines that list a geographic location on the wine label.

Wine Glossary
length
A standard that wine experts use to judge wine quality; indicates a wine that you can taste on the full length of your tongue, rather than just the front of your tongue.

Wine Glossary
oaky
A wine descriptor that refers to a wine that has flavors of oak, usually due to storage in oak barrels.

Wine Glossary
palate
A term that wine tasters use synonymously for mouth.

Wine Glossary
QbA
An acronym for Qualitätswein bestimmter Anbaugebiet. QbA is a classification referring to a quality wine from a special region in Germany.

Wine Glossary
QmP
An acronym for Qualitätswein mit Prädikat. QmP is a classification referring to a quality wine with special attributes produced in Germany.

Wine Glossary
QWPSR
An acronym for Quality Wine Produced in a Specific Region. QWPSR is a classification referring to quality European wines that have official place names.

Wine Glossary
sediment
Refers to solids (tannin and other matter) that develop in some red wines over time.

Wine Glossary
soft
A wine descriptor that refers to a wine with a smooth feel in the palate; usually refers to wines with low acidity.

Wine Glossary
sommelier
An expert wine specialist who typically assembles a wine list and recommends wines that pair with specific foods.

Wine Glossary
tannic
A wine descriptor that refers to a firm, red wine that leaves a dry feel in the palate.

Wine Glossary
tannin
A substance in grape skins that contributes to how a red wine tastes.

Wine Glossary
terroir
A French word (pronounced ter wahr) that refers to the unique combination of topsoil, climate, altitude, and other natural factors that a particular vineyard or wine region has.

Wine Glossary
typicity
A standard that wine experts use to judge wine quality; refers to whether a particular wine is true to its type (for the specific grape variety).

Wine Glossary
varietal
A wine that is named after the principal (or sole) grape variety used to produce the wine.

Wine Glossary
vintage
The year in which the grapes for a specific wine were grown and harvested.

Wine Glossary
VR
An acronym for Vinho Regional. VR indicates a table wine classification for Portuguese wines.