one-to-one

[wuhn-tuh-wuhn]

adjective

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

2. one-on-one.

one-to-one

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

noun

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

Word History and Origins

Origin of one-to-one¹

First recorded in 1870–75