# one-to-one

> English word · Adjective

## Definitions
1. Matching each member of one set with exactly one member of another set.
2. Involving direct communication between two people.
3. Injective, being an injection: having the property that no two elements of the domain are mapped to the same image.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/one-to-one