domino

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. 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.
2. n. A game played with a set of these small blocks, generally 28 in number.
3. n. 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.)
4. n. A costume consisting of a hooded robe worn with an eye mask at a masquerade.
5. n. The mask so worn.
6. n. One wearing this costume.

Century Dictionary and Cyclopedia

1. n. An ecclesiastical garment worn over other vestments in cold weather, made loose, and furnished with a hood.
2. n. By restriction, the hood alone.
3. n. A garment made in partial imitation of that described in def. , and used at masked balls. It is usually made of thin silk, loose, and with large sleeves and a hood.
4. n. A person wearing a domino.
5. n. A half-mask formerly worn over the face by ladies when traveling, at masquerades, etc., as a partial disguise for the features.
6. n. One of the pieces with which the game of dominoes is played. See def. 6.
7. n. plural A game regularly played with twenty-eight flat oblong pieces of ivory, bone, or wood, usually black on one side, the back, and white on the other, the face, the latter being divided into two parts by a cross-line. The face of one domino, the double blank, is unmarked, and that of the others is marked on one or both ends with pips or spots from one to six in number, the highest piece being the double six. Dominoes, however, are made in different styles, and for some games a larger number of pieces and higher markings are used. All play with dominoes consists in matching the pieces in a line by the corresponding ends so long as this can be done, and scoring the number of spots remaining in the beaten hand to the account of the winner.

Wiktionary

1. n. games A tile divided into two squares, each having 0 to 6 dots or pips (as in dice), used in the game of dominoes.
2. n. politics A country that is expected to react to events in a neighboring country, according to the domino effect
3. n. A masquerade costume consisting of a hooded robe and a mask covering the upper part of the face.
4. n. The mask itself.
5. n. The person wearing the costume.
6. n. geometry A polyomino made up of two squares.
7. v. intransitive To collapse in the manner of dominoes.
8. v. transitive To cause to collapse in the manner of dominoes.

GNU Webster's 1913

1. n. A kind of hood worn by the canons of a cathedral church; a sort of amice.
2. n. A mourning veil formerly worn by women.
3. n. 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.
4. n. A costume worn as a disguise at masquerades, consisting of a robe with a hood adjustable at pleasure.
5. n. A person wearing a domino.
6. n. 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.
7. n. One of the pieces with which the game of dominoes is played.

WordNet 3.0

1. n. a loose hooded cloak worn with a half mask as part of a masquerade costume
2. n. a mask covering the upper part of the face but with holes for the eyes
3. n. United States rhythm and blues pianist and singer and composer (born in 1928)
4. n. a small rectangular block used in playing the game of dominoes; the face of each block has two equal areas that can bear 0 to 6 dots