[three] n [ME, fr. three, adj., fr. OE thrie (masc.), threo (fem. & neut.); akin to OHG dri three, L tres, Gk treis] (bef. 12c) 1: one more than two
2: the third in a set or series "the ~ of hearts"
3: something having three units or members -- three adj -- three pron, pl in constr