Added 9 October 2026 one-to-one adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about one-to-one at Wordnik → Where our words come from → Used of relations such that each member of one set is associated with one member of a second set. Related Words: bilateralpersonalisedpersonalizedindividualizedpersonalcase-by-casetransferone-on-oneuniquedirectsoloindividual Back to today's word