|1.||[ noun ] four people considered as a unit|
"he joined a barbershop quartet" "the foursome teed off before 9 a.m."
|Related terms:||gathering quadrumvirate|
|2.||[ noun ] a set of four similar things considered as a unit|
|3.||[ noun ] (music) four performers or singers who perform together|
|Related terms:||musical_organization barbershop_quartet string_quartet|
|4.||[ noun ] (music,fine art) a musical composition for four performers|