/ Dictionary / Index P Protestantize: Meaning and Definition of Find definitions for: Prot•es•tant•ize Pronunciation: (prot'u-stun-tīz"), [key] — -ized, -iz•ing. to convert or cause to conform to Protestantism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Protestantism Protestant Reformation Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language