/ Dictionary / Index P plasticize: Meaning and Definition of Find definitions for: plas•ti•cize Pronunciation: (plas'tu-sīz"), [key] — -cized, -ciz•ing. to render or become plastic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasticize (Thesaurus) plasticity plasticizer Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language