n. 1 persona non grata, pariah, outcast, exile, reject, leper The police had many requests to run the undesirables out of town
adj. 2 unwanted, objectionable, offensive, unacceptable, obnoxious, unsavoury, unwelcome, disliked, distasteful, repugnant, unfit, unbecoming, unsuitable The parks are filled with tramps, drug addicts, and other undesirable elements