Cider Ci"der, n. [F. cidre, OF. sidre, fr. L. sicera a kind of strong drink, Gr. ?; of Oriental origin; cf. Heb. sh[=a]kar to be intoxicated, sh[=e]k[=a]r strong drink.] The expressed juice of apples. It is used as a beverage, for making vinegar, and for other purposes. Note: Cider was formerly used to signify the juice of other fruits, and other kinds of strong liquor, but was not applied to wine. Cider brandy, a kind of brandy distilled from cider. Cider mill, a mill in which cider is made. Cider press, the press of a cider mill.