/ Dictionary / Index U unloosen: Meaning and Definition of Find definitions for: un•loos•en Pronunciation: (un-l'sun), [key] — v.t. to unloose; loosen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unloosen (Thesaurus) unloose unlovely Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language