[fif.teen] n [ME fiftene, adj., fr. OE fiftene, fr. fif five + -tiene (akin to OE tien ten)--more at five, ten] (bef. 12c) 1: one more than fourteen
2: the first point scored by a side in a game of tennis--called also five -- fifteen adj -- fifteen pron, pl in constr -- fif.teenth adj or n