/ Dictionary / Index U unclean: Meaning and Definition of Find definitions for: un•clean Pronunciation: (un-klēn'), [key] — -er, -est. not clean; dirty. morally impure; evil; vile: unclean thoughts. having a physical or moral blemish so as to make impure according to the laws, esp. the dietary or ceremonial laws: an unclean animal; unclean persons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unclean (Thesaurus) uncle uncleanly Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language