/ Dictionary / Index I intra vires: Meaning and Definition of Find definitions for: in•tra vi•res Pronunciation: (in'tru vī'rēz), [key] — Law. Law. within the legal power or authority of an individual or corporation (opposed to ultra vires). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. intravenously intravital Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language