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

With style, grace and a lot of love, the Lower Merion High School figure skating duo of Justin and Suri Lue know how to put on a cutting-edge show. —Krystle Rich, CBS News, 13 Mar. 2026

Surrounded by bright white walls plastered temporarily with schematics and text earlier this month, with valuable pieces of art being unpacked and set on the floor until they could be hung, the duo was witnessing the fruits of more than two years’ labor. —Amy Paige Condon, AJC.com, 12 Mar. 2026

The duo join veteran Annapurna executive Skye Optican, VP International Film & TV as well as Head of Theatre, who has been based in London for several years growing Annapurna’s international presence and slate across film, TV and theatre. —Andreas Wiseman, Deadline, 12 Mar. 2026

For Australian duo 2charm, there’s a formula. —Reanna Cruz, Pitchfork, 12 Mar. 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