one-one C2+ Topic:Mathematics & Measurement Also spelled one-to-one US /ˈwʌnˈwʌn/ UK /ˈwʌnˈwʌn/ See IPA manual Meanings 1 adj mapping each element of one set to exactly one distinct element of another set The proof requires a one-one correspondence between the two classes. Thesaurus Synonyms 1 adj · mapping each element of one... one-to-oneinjective ↔ Opposites many-one Word family Related forms correspondencemappinginjective Etymology Elliptical mathematical compound from one-to-one. Topics Mathematics & Measurement External links Cambridge Dictionary Wiktionary Google Images # one-one **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /ˈwʌnˈwʌn/ **IPA (UK):** /ˈwʌnˈwʌn/ ## Meanings 1. mapping each element of one set to exactly one distinct element of another set ## Examples - The proof requires a one-one correspondence between the two classes. ## Synonyms - one-to-one - injective ## Antonyms - many-one ## Related Forms - correspondence - mapping - injective ## Etymology Elliptical mathematical compound from one-to-one. ## Topics - Mathematics & Measurement markdown