/ Dictionary / Index O opera window: Meaning and Definition of Find definitions for: op'era win"dow Pronunciation: [key] a narrow, fixed window on each side of the rear passenger compartment of an automobile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. operatory opercle Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language