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dom·i·no 1

n. pl. dom·i·noes or dom·i·nos
a. A small rectangular wood or plastic block, the face of which is divided into halves, each half being blank or marked by dots resembling those on dice.
b. dominoes or dominos(used with a sing. or pl. verb) A game played with a set of these small blocks, generally 28 in number.
2. A country expected to react politically to events as predicted by the domino theory: "The dominos did indeed fall in Indochina" (Arthur M. Schlesinger, Jr.).

[French, probably from domino, mask, perhaps because of the resemblance between the eyeholes and the spots on some of the tiles; see domino2.]

dom·i·no 2

n. pl. dom·i·noes or dom·i·nos
a. A costume consisting of a hooded robe worn with an eye mask at a masquerade.
b. The mask so worn.
2. One wearing this costume.

[French, probably from Latin (benedīcāmus) dominō, (let us praise) the Lord, dative of dominus, lord; see dem- in Indo-European roots.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dominos - any of several games played with small rectangular blocksdominos - any of several games played with small rectangular blocks
table game - a game that is played on a table
References in classic literature ?
Jo peeped into his half-open eye, felt his little heart, and finding him stiff and cold, shook her head, and offered her domino box for a coffin.
A psalm, which he himself accompanied with a deep mellow voice, which age had not deprived of its powers, commenced the proceedings of the day; and the solemn sounds, Venite exultemus Domino, so often sung by the Templars before engaging with earthly adversaries, was judged by Lucas most appropriate to introduce the approaching triumph, for such he deemed it, over the powers of darkness.
At the centre window, the one hung with white damask with a red cross, was a blue domino, beneath which Franz's imagination easily pictured the beautiful Greek of the Argentina.