mononym in English dictionary mononym Meanings and definitions of "mononym" A single name by which a person, thing etc is known. For example, Madonna (the pop star). noun A single name by which a person, thing etc is known. For example, Madonna (the pop musical artist). noun A single term for a thing or concept, allowing for no synonyms. more Grammar and declension of mononym mononym ( plural mononyms) mononym (plural mononyms) more Sample sentences with "mononym" Declension Stem Try again Available translations Cornish Czech Estonian French German Portuguese Authors