"quartette" in the noun sense
1. quartet, quartette
four performers or singers who perform together
2. quartet, quartette, quadruplet, quadruple
a set of four similar things considered as a unit
3. quartet, quartette, foursome
four people considered as a unit
"he joined a barbershop quartet"
"the foursome teed off before 9 a.m."
4. quartet, quartette
a musical composition for four performers
Source: WordNet® (An amazing lexical database of English)
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