has-been UK /ˈhæz.biːn/US /ˈhæz.bɪn/adjective 1noun 1forms 2 adjective1 •(informal, disapproving) Of or pertaining to someone or something that was once popular, successful or important but is no longer considered so. noun1 •(informal, disapproving) A person, especially one who was formerly popular or influential, who continues in their field after their popularity or effectiveness has peaked and is now in decline.I think Apple Computer is a has-been. — 1986 formshas beens · has-beens