An apéritif is a dry, non-sweet alcoholic beverage that is typically served before a meal to encourage hunger. Vermouth, champagne, pastis, gin, ouzo, fino, amontillado, and other varieties of dry sherry are popular aperitifs.

There is no single alcoholic drink that is always served as an apéritif. Fortified wineliqueur, and dry champagne are probably the most common choices. Because it is served before dining, the emphasis is usually on dry rather than sweet, as a general guideline.

FOR MORE INFO: https://en.wikipedia.org/wiki/Ap%C3%A9ritif_and_digestif