tic-tac-toe
noun(also tick-tack-toe)
(North American English) (British English noughts and crosses)
[uncountable]a simple game in which two players take turns to write Os or Xs in a set of nine squares. The first player to complete a row of three Os or three Xs is the winner. 井字游戏，圈叉游戏（二人轮流在井字形九格中画 O 或 X，先将三个 O 或 X 连成一线者为胜） 
Word Origin1960s: imitative; from tick-tack, used earlier to denote games in which the pieces made clicking sounds.