Definition of tic-tac-toe in English English dictionary
A game in which two players take turns putting circles and crosses on a 3x3 grid and try to get three of the same symbols in a line
A variant of ticktacktoe. a children's game in which two players draw X's or O's in a pattern of nine squares, trying to get three in a row British Equivalent: noughts and crosses (tic-tac-toe (1800-1900); from the sound of play)