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

While the original launched in 2016 with a hyaluronic acid-vitamin B5 duo, its 2024 reformulation now features ceramides to improve upon the texture and double down on moisturizing benefits. — Beatrice Zocchi, Vogue, 18 Aug. 2026

The duo was ultimately cast in the show, which originally ran on NBC for four seasons from 2006 to 2010 before being revived as a miniseries in 2015 (the two stars did not return). — Zack Sharf, Variety, 18 Aug. 2026

Now, the duo is demonstrating how WNBA players can turn cultural relevance and direct connections with fans into a business of their own. — Allison Smith, Forbes.com, 18 Aug. 2026

Alvin Kamara returns to the fold as well, providing a dynamic duo in the backfield. — Scott Thompson, FOXNews.com, 18 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