foursome meaning and definition

FOURSOME noun

Definition of foursome (noun)

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