One-to-one

adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A personal relationship between two people.
  2. 2
    A direct match or equivalent.

    "And though [Jesse] Armstrong[…] continues his avoidance of easy one-to-ones, there’s more than a whiff of Elon Musk to Venis […]."

Adjective
  1. 1
    Matching each member of one set with exactly one member of another set.

    "There is a one-to-one relationship between days with large cash shortages and his workdays."

  2. 2
    Involving direct communication between two people. UK

    "a one-to-one discussion"

  3. 3
    Injective, being an injection: having the property that no two elements of the domain are mapped to the same image.
Adjective
  1. 1
    used of relations such that each member of one set is associated with one member of a second set wordnet

Synonyms

All synonyms
121injectiveone-on-one

Example

More examples

"Essentially it's a one-to-one match, but the content of that match is a level so high as to be unthinkable to an ordinary person."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.