The Collaborative International Dictionary of English v.0.48:
Vintage \Vint"age\ (?; 48), n. [Corrupted by influence of
vintner, vintry, from OE. vindage, vendage, for vendange, OF.
vendenge, F. vendange, from L. vindemia; vinum wine, grapes +
demere to take off; de + emere, originally, to take. See
Wine, Redeem, and cf. Vindemial.]
1. The produce of the vine for one season, in grapes or in
wine; as, the vintage is abundant; the vintage of 1840.
2. The act or time of gathering the crop of grapes, or making
the wine for a season.
Vintage spring, a wine fount.
Vintage time, the time of gathering grapes and making wine.