one-to-one

adjective

ˌwən-tə-ˈwən 

-də-

1

: pairing each element of a set uniquely with an element of another set

2

: one-on-one sense 2

Examples of one-to-one in a Sentence

Recent Examples on the Web

Similar to swordfighting games in past entries, this game tracks the movement and angle of your thumb one-to-one. — Jordan Minor, PC Magazine, 5 Oct. 2026

Signpost, our digital information service, has reached 20 million people navigating the hardest moments of their lives, nearly 591,000 of them through one-to-one guidance from moderators, many displaced themselves. — Jeannie Annan, Fortune, 2 Oct. 2026

Someone interested primarily in direct one-to-one dating may place less value on its community emphasis. — Miami Herald, 25 Sep. 2026

The books might not be a one-to-one, but Phillips wrote about the high life around him as his own family finances floundered in the shadow of the Great Depression. — Brayden Garcia, Fort Worth Star-Telegram, 22 Sep. 2026

Word History

First Known Use

1873, in the meaning defined at sense 1

Rhymes for one-to-one

• anyone
• everyone
• megaton
• overdone
• overrun
• begun
• grandson
• gudrun
• handgun
• homespun
• outdone
• outrun

Kids Definition

one-to-one

adjective

ˌwən-tə-ˈwən

: pairing each element of a set with one and only one element of another set

a one-to-one correspondence between the real numbers and the points on a straight line