/ Dictionary / Index U unrestrained: Meaning and Definition of Find definitions for: un•re•strained Pronunciation: (un"ri-strānd'), [key] — adj. not restrained or controlled; uncontrolled or uncontrollable: the unrestrained birthrate in some countries. not constrained; spontaneous: unrestrained laughter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unrestrained (Thesaurus) unrest unrestraint Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language