What does “vintage” mean?
The word vintage simply refers to the year in which the grapes for any particular wine were harvested. A vintage wine may include only grapes from the vintage specified, though many regions do allow a small percentage of an adjacent vintage’s wine to be added to a blend while still allowing it to be called a vintage wine.
Non-vintage wines are generally blends of various vintages, though some wines made in Europe have to label bottles as non-vintage wines due to the fact that the grapes being used are not authorized for that particular region or country.
Much Champagne is non-vintage. This allows the Champagne house to maintain a consistent style from year to year, no matter what the weather brings.