unbecoming /ˌʌnbɪˈkʌmɪŋ/adjective 2noun 1forms 3 adjective2 •Not flattering, attractive or appropriate.She wore a rather unbecoming hairstyle. •Not in keeping with the expected standards of one's position.He was accused of conduct unbecoming an officer and a gentleman. noun1 •The process by which something unbecomes. formsunbecomings · more unbecoming · most unbecoming