/ Dictionary / Index P passivate: Meaning and Definition of Find definitions for: pas•si•vate Pronunciation: (pas'u-vāt"), [key] — -vat•ed, -vat•ing. to treat (a metal) to render the surface less reactive chemically. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Passion Week passive Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language