Definition of tic-tac-toe in English:

tic-tac-toe

Syllabification: tic-tac-toe
Pronunciation: /ˌtikˌtakˈtō
 
/
(also tick-tack-toe)

noun

North American
A game in which two players seek in alternate turns to complete a row, a column, or a diagonal with either three O’s or three X’s drawn in the spaces of a grid of nine squares.
More example sentences
  • Use washable window markers to make colorful creations that even passers-by can enjoy, or to play endless, paper-free games like tic-tac-toe and hangman.
  • So, is the universe to us a game of tic-tac-toe or a game of chess?
  • Consider the problem, ‘How can I win the game of tick-tack-toe?’

Origin

imitative; from tick-tack, used earlier to denote games in which the pieces made clicking sounds.

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Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope