domino UK /ˈdɒmɪnəʊ/US /ˈdɑməˌnoʊ/noun 8verb 2forms 4 noun8 •A 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.Dominoes of indiscretions down Falling all around, in cycles, in circles Constantly consuming Conquer and devour — 2000 •A country that is expected to react to events in a neighboring country, according to the domino effect. •A masquerade costume consisting of a hooded robe and a mask covering the upper part of the face.Then he hunted for the black carnival domino, supposing that it was the appropriate thing for a penitent to wear. — 1983 •The mask itself.He wore a domino, but beneath it could be seen his whiskers, cut after the English fashion, and long and pendent. — 1872 •A polyomino made up of two squares. •The person wearing the costume. •[in the plural] (slang) A person's teeth.[…] break your dominoes by grinding them that way. — 1892 •(informal) A mistake in performing.Any player is liable to make a 'domino' — that is to say, he goes wool-gathering and continues to play when everyone else has stopped. If he does so at a grown-up concert the fault is irredeemable […] — 1932 verb2 •To collapse in the manner of dominoes.A dismasting often means the dominoing of one mast into the other, down through the decks, cannoning the cargo through the hull below, and sinking the ship very quickly. — 2010 •To cause to collapse in the manner of dominoes. formsdominoed · dominoing · dominoes · dominos