noun a person wearing a domino.
2. domino ·noun a mourning veil formerly worn by women.
3. domino ·noun one of the pieces with which the game of dominoes is played.
4. domino ·noun a kind of hood worn by the canons of a cathedral church; a sort of amice.
5. domino ·noun a costume worn as a disguise at masquerades, consisting of a robe with a hood adjustable at pleasure.
6. domino ·noun a kind of mask; particularly, a half mask worn at masquerades, to conceal the upper part of the face. dominos were formerly worn by ladies in traveling.
7. domino ·noun a game played by two or more persons, with twenty-eight pieces of wood, bone, or ivory, of a flat, oblong shape, plain at the back, but on the face divided by a line in the middle, and either left blank or variously dotted after the manner of dice. the game is played by matching the spots or the blank of an unmatched half of a domino already played.