Vintage, in wine-making, is the process of picking grapes an creating the finished product. A vintage wine is one made from grapes that were all, or primarily, grown and harvested in a single specified year. In certain wines it can denote quality, as in Port wine, where Port houses make and declare "vintage" Port in their best years. From this tradition, a common, though incorrect, usage applies the term to any wine that is perceived to be particularly old or of a particularly high quality.