quartet

n. a group of four musicians who play instruments or sing together.

n. a musical ensemble consisting of four performers, or a musical composition written for such a group.

“The string quartet played beautiful music during the wedding ceremony.”

“The jazz quartet spent the evening improvising over classic standards, with each member taking a turn to lead the melody.”

n. any group of four people or things that belong together.

n. a set or group of four related people or things.

“A quartet of researchers published the new study on climate change.”

“The final quartet of candidates waited nervously in the lobby, each hoping to be the one selected for the executive position.”

Formal