one-to-one

adjective

1
: pairing each element of a set uniquely with an element of another set
2

Examples of one-to-one in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
According to Clark, coconut sugar can be substituted one-to-one. Sherri Gordon, Health, 15 Dec. 2025 Mix a one-to-one ratio of baking soda and toothpaste together, and apply the paste to the water rings with a damp cloth. Jolie Kerr, Better Homes & Gardens, 5 Dec. 2025 In contrast, ETFs effectively hold the cryptocurrency passively and issue shares backed one-to-one with the actual asset. Arjun Kharpal, CNBC, 2 Dec. 2025 Studies have found that women with steady one-to-one support are less likely to need pain medication or a C-section and often report shorter, more positive birth experiences. Lucy Notarantonio, MSNBC Newsweek, 26 Nov. 2025 See All Example Sentences for one-to-one

Word History

First Known Use

1873, in the meaning defined at sense 1

Time Traveler
The first known use of one-to-one was in 1873

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Cite this Entry

“One-to-one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one-to-one. Accessed 28 Dec. 2025.

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
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