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

Some are slim and laced, almost one-to-one swaps for ballet flats, and are versatile enough to wear with everything from romantic dresses to linen pants. — Aemilia Madden, Glamour, 18 June 2026

There is no one-to-one correlation on these things, but those organizations being among the leaders in those categories does raise questions. — Eno Sarris, New York Times, 4 June 2026

The Aries Moon conjoins Saturn, making one-to-one dynamics more serious. — Tarot.com, Baltimore Sun, 10 June 2026

Later, the Moon trines Mercury in Cancer, helping one-to-one conversations settle the confusion. — Tarot.com, Hartford Courant, 7 June 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