Main entry: quartet, quartette
Definition: a musical composition for four performers
Main entry: quartet, quartette, foursome
Definition: four people considered as a unit
Usage: he joined a barbershop quartet; the foursome teed off before 9 a.m.
Main entry: quadruple, quadruplet, quartet, quartette
Definition: a set of four similar things considered as a unit
Main entry: quartet, quartette
Definition: four performers or singers who perform together