noughts and crosses
noun🔊/ˌnɔːts ən ˈkrɒsɪz/
🔊/ˌnɔːts ən ˈkrɔːsɪz/
(British English) (North American English tic-tac-toe)
[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. 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 连成一线者获胜） 
