foursome Meaning, Definition & Usage

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

WordNet