banishEnglishOxford American Thesaurusbanish verb 1 he was banished for his crime: exile, expel, deport, eject, expatriate, extradite, repatriate, transport; cast out, oust, drive away, evict, throw out, exclude, shut out, ban; Christian Church excommunicate; in ancient Greece ostracize. ▷antonyms admit; readmit. 2 Chris's smile would banish any fear or suspicion: dispel, dismiss, disperse, scatter, dissipate, drive away, drive off, chase away, rout, oust, cast out, shut out, get rid of, quell, allay, eliminate, dislodge. ▷antonyms engender.