dom ‧ i ‧ no /ˈdɒmənəʊ, ˈdɒmɪnəʊ $ ˈdɑːmənoʊ/ BrE AmE noun ( plural dominoes )
[ Date: 1700-1800 ; Language: French ; Origin: perhaps from Italian , 'lord, ruler' , shouted by the winner of a game ]
1 . [countable] one of a set of small flat pieces of wood, plastic etc, with different numbers of spots, used for playing a game
2 . dominoes [uncountable] the game played using dominoes
3 . domino effect a situation in which one event or action causes several other things to happen one after the other