/ Dictionary / Index U unstrap: Meaning and Definition of Find definitions for: un•strap Pronunciation: (un-strap'), [key] — -strapped, -strap•ping. to take off or slacken the strap of. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unstrap (Thesaurus) unstrained unstratified 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