/ Dictionary / Index U untidy: Meaning and Definition of Find definitions for: un•ti•dy Pronunciation: (un-tī'dē), [key] — adj., v., -di•er, -di•est, -died, -dy•ing. —adj. not tidy or neat; slovenly; disordered: an untidy room; an untidy person. not well-organized or carried out: an untidy plan. —v.t. to mess up; disorder; disarrange: The guests untidied the room. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: untidy (Thesaurus) unthrone untie Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language