Definitions
1.nounA tile divided into two squares, each having 0 to 6 (or sometimes more) dots or pips (as in dice), used in the game of dominoes.
2.nounA country that is expected to react to events in a neighboring country, according to the domino effect.
3.nounA masquerade costume consisting of a hooded robe and a mask covering the upper part of the face.
4.nounThe mask itself.
5.nounThe person wearing the costume.
6.nounA polyomino made up of two squares.
7.nounA mistake in performing.
8.verbTo collapse in the manner of dominoes.
9.verbTo cause to collapse in the manner of dominoes.