/ Dictionary / Index S substantive right: Meaning and Definition of Find definitions for: sub'stantive right' Pronunciation: [key] a right, as life, liberty, or property, recognized for its own sake and as part of the natural legal order of society. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. substantive substantivize Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language