uncleanPronunciation: /ʌnˈkliːn/Translate unclean | into Spanish Definition of unclean adjective 1dirty:the firm was fined for operating in unclean premises 2morally wrong:unclean thoughts (of food) regarded in a particular religion as impure and unfit to be eaten:both religions regard pork as unclean (in biblical use) ritually impure; (of a spirit) evil. Derivatives uncleannessPronunciation: /ʌnˈkliːnnɪs/ noun Origin: Old English unclǣne (see un-1, clean)unclean in other Oxford dictionaries Definition of unclean in the US English dictionary