one-to-one

== English == === Pronunciation === === Adjective === one-to-one (comparative more one-to-one, superlative most one-to-one) Matching each member of one set with exactly one member of another set. (chiefly UK) Involving direct communication between two people. (mathematics, of a function) Injective, being an injection: having the property that no two elements of the domain are mapped to the same image. ==== Synonyms ==== (involving direct communication): one-on-one (North America) ==== Coordinate terms ==== one-to-many, many-to-one, many-to-many onto ==== Translations ==== ==== See also ==== face-to-face man-to-man peer-to-peer === Noun === one-to-one (plural one-to-ones) A personal relationship between two people. Synonym: 121 A direct match or equivalent.