duo

1 of 2

noun

ˈdü-(ˌ)ō 

also ˈdyü-

plural duos

1

: duet

2

: pair sense 2

duo-

2 of 2

combining form

: two

duologue

Synonyms of duo

Noun

• pair
• couple

Examples of duo in a Sentence

Noun

The comedy duo will perform tonight.

The author-illustrator duo will be signing their books tomorrow.

He and his partner make quite a duo.

Recent Examples on the Web

Noun

The bronze medal, which the duo won in March, was Anderson and Chacon’s first together on the world tour. — Ava Dicecca, Sun Sentinel, 29 June 2026

The father-and-son duo from Central Florida drove down to see Manny’s native Portugal take on Colombia, a team with legions of fans in Miami. — Douglas Hanks, Miami Herald, 28 June 2026

For a modern twist on the linen duo, look to Staud’s halterneck and pant pairing or Merlette’s wrap blouse and midi skirt—either ideal for date nights and evenings spent catching-up on a rooftop patio. — Christina Holevas, Vogue, 27 June 2026

Over 17,000 shoppers have awarded this shampoo-and-conditioner duo five stars. — Genevieve Cepeda, InStyle, 27 June 2026

Word History

Etymology

Noun

Italian, from Latin, two — more at two

Combining form

Latin duo

First Known Use

Noun

1590, in the meaning defined at sense 1

Kids Definition

duo

noun

ˈd(y)ü-ō 

plural duos

1

: duet

2

: a group of two : pair entry 1