four

(noun) the cardinal number that is the sum of three and one. Synonyms: 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe.

(noun) a playing card or domino or die whose upward face shows four pips. Synonyms: four-spot.

(adj) being one more than three. Synonyms: 4, iv.