1. the cardinal number that is the sum of three and one

Similar word(s): four, foursome, quadruplet, quaternary, quaternion, quaternity, tetrad

Definition categories: quantity, digit, figure

2. four performers or singers who perform together

Similar word(s): quartette

Definition categories: group

3. a set of four similar things considered as a unit

Similar word(s): quadruple, quadruplet, quartette

Definition categories: group, set

4. four people considered as a unit

- he joined a barbershop quartet

Similar word(s): foursome, quartette

Definition categories: group, assemblage, gathering

5. a musical composition for four performers

Similar word(s): quartette

Definition categories: communication, composition, opus, piece

Sentences with quartet as a noun:

- A string quartet.

- A quartet of violinists.