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

There has been speculation about the duo’s futures for some time. — Jack Pitt-Brooke, New York Times, 12 Aug. 2026

The experience has also turned the mother-daughter duo into advocates for mental health awareness and more intentional technology use. — Brady Halbleib, CBS News, 11 Aug. 2026

In the months since, the duo has stepped out together on several occasions. — Jack Smart, PEOPLE, 11 Aug. 2026

The technology soon generated seven figures in trading profits, prompting the duo to adapt it into an enterprise platform. — Camila Grigera Naón, Fortune, 11 Aug. 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