What does trio mean?
A trio is a group of three people, animals, or things, especially one whose members work or belong together. The word can describe an informal gathering, such as “a trio of friends,” as well as a formal arrangement, such as a trio of performers or objects. In music, “trio” has a precise meaning: a composition or ensemble for three performers, including arrangements such as a piano trio or string trio. Outside music, the term is generally neutral, though it can suggest a close, balanced, or distinctive small group. “Trio” is useful because it conveys both the number of members and, often, the sense that they form a unified unit. It is more specific than the general words “group” or “set,” while remaining broader and less specialized than terms such as “triad.”
nounA group or arrangement of three people or things. In music, a trio is a composition or ensemble for three performers.
- A group of three people or things.
- A musical composition or ensemble for three performers.
"The three friends formed a close trio that spent their weekends exploring the city."
"A trio of musicians performed the opening concert."
"She invited a small trio of colleagues to join the project."
The plural is formed by adding -s and is used for groups of three or musical ensembles of three.
"Two separate trios entered the competition."
From a musical group of three to any close-knit group of three, “trio” expresses the compactness of a small, balanced unit.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does trio come from?
“Trio” comes from Italian, where it originally referred to a set or group of three, especially in music. The Italian word derives from Latin “tres,” meaning “three,” and English borrowed the term in the early 17th century. Related English words such as “triad,” “triangle,” “trinity,” and “triple” reflect the same broad numerical root meaning three.
Related word forms
How trio is actually used
In general use, “trio” is neutral and often suggests a small, cohesive group. In music, it is a standard term for an ensemble or composition involving three performers; terms such as “piano trio” and “string trio” specify the instruments involved.
Easily confused with trio
A trio is a general group of three, while a triad often emphasizes a structured or distinctive grouping of three, as in art, politics, or religion.