/ Dictionary / Index O officialize: Meaning and Definition of Find definitions for: of•fi•cial•ize Pronunciation: (u-fish'u-līz"), [key] — -ized, -iz•ing. to make official; place under official authority or control. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: officialize (Thesaurus) officialism officiant Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language