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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 ?
Latitude and longitude, noon every day; and how many miles we made last twenty-four hours; and all the domino games I beat and horse billiards; and whales and sharks and porpoises; and the text of the sermon Sundays (because that'll tell at home, you know); and the ships we saluted and what nation they were; and which way the wind was, and whether there was a heavy sea, and what sail we carried, though we don't ever carry any, principally, going against a head wind always--wonder what is the reason of that?
Jones expressed some surprize on this occasion, and declared it must be some mistake; but the maid persisting that she was certain of the name, all the women were desirous of having the bundle immediately opened; which operation was at length performed by little Betsy, with the consent of Mr Jones: and the contents were found to be a domino, a mask, and a masquerade ticket.
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.