Definition of tic-tac-toe noun from the Oxford Advanced American Dictionary

 

tic-tac-toe

 noun
(also tick-tack-toe)noun
NAmE//ˌtɪk tæk ˈtoʊ//
 
[uncountable]
 
jump to other results
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.
See the Oxford Advanced Learner's Dictionary entry: tic-tac-toe