- quartet, quartette, foursome - four people considered as a unit; "he joined a barbershop quartet"; "the foursome teed off before 9 a.m."
--1 is a kind of gathering, assemblage
--1 has particulars: quadrumvirate - four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe - the cardinal number that is the sum of three and one
--2 is a kind of digit, figure