A duo is a pair of things or people. Batman and Robin are a famous dynamic duo, but a duo is any two people doing something together, not just crime fighting. In fact, a duo usually entertains.

You can complain that you can't find a duo of matching socks, but it's more common to use duo for people who perform together. For example, Penn and Teller are a magician duo, and Laurel and Hardy were a comedy duo. If you and your sister play your ukuleles together in the subway for tips, you're also a duo. Originally, a duo was a song written for two voices, from the Latin meaning of duo, "two."

Definitions of duo

n two items of the same kind

brace, couple, couplet, distich, duad, duet, dyad, pair, span, twain, twosome, yoke
(bridge) a pair of playing cards that are the only cards in their suit in the hand dealt to a player
Type of:
2, II, deuce, two
the cardinal number that is the sum of one and one or a numeral representing this number

n a pair who associate with one another

couple, duet, twosome
same-sex marriage
two people of the same sex who live together as a family
Type of:
two people considered as a unit

n two performers or singers who perform together

duet, duette
Laurel and Hardy
United States slapstick comedy duo who made many films together
Type of:
musical group, musical organisation, musical organization
an organization of musicians who perform together

n a musical composition for two performers

duet, duette
Type of:
composition, musical composition, opus, piece, piece of music
a musical work that has been created

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