noughts and crosses n 1: a game in which two players alternately put crosses and circles in one of the compartments of a square grid of nine spaces; the object is to get a row of three crosses or three circles before the opponent does [syn: {ticktacktoe}, {ticktacktoo}, {tick-tack-toe}, {tic-tac-toe}, {tit-tat- toe}, {noughts and crosses}]