Definition of Duo

Noun: duo (duos,dui) 'd(y)oo,ow

Two items of the same kind
- couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duet, dyad, duad
Two performers or singers who perform together
- duet, duette
A pair who associate with one another
"the engaged duo";
- couple, twosome, duet
A musical composition for two performers
- duet, duette