/ Dictionary / Index W window envelope: Meaning and Definition of Find definitions for: win'dow en"velope Pronunciation: [key] an envelope with a transparent opening through which the address on the enclosure may be read. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. window dressing windowglass shell Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language