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Webster Dictionary (0.00 / 0 votes) Rate this definition: Sash (noun) a scarf or band worn about the waist, over the shoulder, or otherwise; a belt; a girdle, -- worn by women and children as an ornament; also worn as a badge of distinction by military officers, members of societies, etc. Sash (verb) to adorn with a sash or scarf. Sash (noun)
A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and/or air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame in the opening; the sash and frame are also referred to as a window.