Four performers or singers who perform together.

synonym: quartet.

Dutch: kwartet, viertal
Polish: kwartet

A set of four similar things considered as a unit.

synonyms: quadruple, quadruplet, quartet.

Four people considered as a unit.

synonyms: foursome, quartet.

Dutch: viertal
Polish: czwórka

A musical composition for four performers.

synonym: quartet.

Polish: kwartet