last name noun 2last-name verb 1forms 4 noun2 •The last element of a full name, particularly when it could also be given name in East Asian and other cultural traditions.In a structure typical for East Asia cultures, last names are usually used as given names. It usually differentiates that person from the other members of a group (typically a family or clan) who have a common family name •Synonym of surname, a person's family name. last-name verb1 •(rare) To address by last name. formslast-named · last-naming · last-names · last names