one-to-one

American  

[wuhn-tuh-wuhn] / ˈwʌn təˈwʌn /

adjective

1. Also (of the relationship between two or more groups of things) corresponding element by element.

2. one-on-one.

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one-to-one British  

adjective

1. (of two or more things) corresponding exactly

2. denoting a relationship or encounter in which someone is involved with only one other person

   one-to-one tuition

3. maths characterized by or involving the pairing of each member of one set with only one member of another set, without remainder

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noun

1. a conversation, encounter, or relationship between two people

Etymology

Origin of one-to-one

First recorded in 1870–75

Compare meaning

How does one-to-one compare to similar and commonly confused words? Explore the most common comparisons:

• onto vs. one-to-one