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

The grants obligate Tennessee to give a one-to-one match to both UT and TSU. —Rachel Wegner, The Tennessean, 2 July 2025

Conveniently, two of the best loyalty programs in the space—Chase Ultimate Rewards points and Bilt Rewards points—transfer to the Hyatt program instantly, at a one-to-one ratio. —Chris Dong, Travel + Leisure, 30 June 2025

So, if your friends didn’t receive announcements, this may not be a one-to-one comparison with the weddings to which you were invited. —R. Eric Thomas, Mercury News, 28 June 2025

Newcastle United’s Tino Livramento spoke of doing one-to-one work with Cole once team sessions had finished, where emphasis would be placed on improving his body positioning in certain areas of the pitch. —Art De Roché, New York Times, 28 June 2025

Word History

First Known Use

1873, in the meaning defined at sense 1

Rhymes for one-to-one

• aldosterone
• anticyclone
• progesterone
• testosterone
• acetone
• anglophone
• baritone
• bourguignon
• buspirone
• chaperon
• chaperone
• cobblestone

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