(dom′ə·nō) noun plural ·noes or ·nos
1. A small mask for the eyes.
2. A loose robe, hood and mask worn at masquerades.
3. A person wearing this.
4. A hooded garment forming an outer ecclesiastical vestment. [<MF, a clerical garment <L dominus lord]

(dom′ə·nō) noun plural ·noes or ·nos
1. A small, flat block, as of wood or plastic, divided on one side into halves, each left blank or marked with usually one to six dots.
2. plural A game played with a set (usually 28) of such pieces, the object being to match the halves having the same number of dots: construed as singular.
—adjective Describing the view or political theory that a series of events is unavoidably contingent on the occurrence of an initial event, as a row of dominoes collapses when the first is toppled: the domino theory of Communist aggrandizement.