/ Dictionary / Index D drop window: Meaning and Definition of Find definitions for: drop' win"dow Pronunciation: [key] a window with a sash that slides into a space below the sill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. drop valve dropwort Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language