one-to-one

adjective

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

“a one-to-one discussion”

Similar
one-on-one121matched
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Meanings

adjectiveone-to-one (comparative more one-to-one, superlative most one-to-one)

comparative more one-to-one · superlative most one-to-one

  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. UKInvolving direct communication between two people.

    a one-to-one discussion

    1 more example

    a one-to-one teaching session

    Synonyms: one-on-one

  3. mathematicsInjective, being an injection: having the property that no two elements of the domain are mapped to the same image.
nounone-to-one (plural one-to-ones)

plural one-to-ones

  1. A personal relationship between two people.

    Synonyms: 121

  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 […].

    2025 June 2, Adrian Horton, “Tech-bro satire Mountainhead is an insufferable disappointment”, in The Guardian, →ISSN

Synonyms & antonyms

adjectiveInvolving direct communication between two people.

Similar
one-on-one

nounA personal relationship between two people.

Similar
121

More synonyms by meaning

adjectiveused of relations such that each member of one set is associated with one member of a second set

Similar
matched
Also see
injectiveone-for-oneone-oneone-on-one

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Bulgarian биективен
  • биективен (biektiven)matching each member of one set with one member of another set
Catalan bijectiu, biunívoc
  • bijectiumatching each member of one set with one member of another set
  • biunívocmatching each member of one set with one member of another set
Chinese Mandarin 一對一 /一对一
  • 一對一 /一对一 (yīduìyī)matching each member of one set with one member of another set
Finnish yhdestä yhteen
  • yhdestä yhteenmatching each member of one set with one member of another set
French biunivoque
  • biunivoquematching each member of one set with one member of another set
Italian biiettivo
  • biiettivomatching each member of one set with one member of another set
Norwegian Bokmål en-til-en
  • en-til-enmatching each member of one set with one member of another set
Polish odpowiedni
  • odpowiednimatching each member of one set with one member of another set
Portuguese bijetor
  • bijetormatching each member of one set with one member of another set
Russian оди́н к одному
  • оди́н к одному (odín k odnomu)matching each member of one set with one member of another set
Spanish biunívoco, uno a uno
  • biunívocomatching each member of one set with one member of another set
  • uno a unomatching each member of one set with one member of another set
  • biyectivomatching each member of one set with one member of another set
Tagalog isa-sa-isa
  • isa-sa-isamatching each member of one set with one member of another set
Cite this entry
APA

one-to-one. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/one-to-one

MLA

“one-to-one.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/one-to-one. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “one-to-one,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/one-to-one.

Source: one-to-one on Wiktionary, CC BY-SA 4.0.