/ Dictionary / Index U unconstitutional: Meaning and Definition of Find definitions for: un•con•sti•tu•tion•al Pronunciation: (un"kon-sti-t'shu-nl, -ty'-), [key] — adj. not constitutional; unauthorized by or inconsistent with the constitution, as of a country. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unconstitutional (Thesaurus) unconscious unconstraint Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language