trio

A trio is a group or set of three related items or people. The term is used across many fields to denote a triple arrangement or collection that functions as a unit. In everyday language, a trio may refer to three performers, three siblings, or any three objects linked by purpose or context.

Etymology: The word comes from Italian trio, derived from Latin tres meaning three. The term has long been used in music and the arts to denote groups of three or compositions for three parts.

In music, a trio can refer to either a composition written for three voices or instruments or a performing group of three musicians. Common formats include the piano trio (piano, violin, cello) and the string trio (violin, viola, cello). In jazz, a trio typically consists of three players, such as piano, bass, and drums, while vocal trios feature three singers.

Other uses extend beyond music. In film, literature, and criticism, a trio often denotes a central group of three protagonists or main characters who share the narrative focus. In sports, games, and everyday speech, a trio can describe a three-person team or a coordinated unit of three players working together.

See also: triad.