/ Dictionary / Index S substantivize: Meaning and Definition of Find definitions for: sub•stan•tiv•ize Pronunciation: (sub'stun-tu-vīz"), [key] — -ized, -iz•ing. to use (an adjective, verb, etc.) as a substantive; convert into a substantive: a substantivized participle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. substantive right substation Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language