one-to-one
Americanadjective
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Also (of the relationship between two or more groups of things) corresponding element by element.
adjective
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(of two or more things) corresponding exactly
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denoting a relationship or encounter in which someone is involved with only one other person
one-to-one tuition
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maths characterized by or involving the pairing of each member of one set with only one member of another set, without remainder
noun
Etymology
Origin of one-to-one
First recorded in 1870–75
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
RSUs are convertible to shares of class A common stock on a one-to-one basis.
From Barron's • May 27, 2026
“This isn’t a one-to-one ratio,” Carden explains, “but if you’re a farmer and you’re looking at this, you don’t see a lot of hope looking forward.”
From Salon • May 15, 2026
The use of one-to-one devices is left to the discretion of each school.
From Los Angeles Times • Mar. 19, 2026
Crypto exchange Kraken will become a distribution partner to Nasdaq, making the one-to-one tokenized versions of public company stocks available to Kraken’s customers in Europe and around the world.
From The Wall Street Journal • Mar. 9, 2026
He inoculated two sealed, aerated cartons with a mixture of two fly strains—ABC and CBA—in a one-to-one ratio.
From "The Gene" by Siddhartha Mukherjee
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
