window sash

noun

the frame holding the pane of a window.

Origin

1755-65

Examples from the web for window sash

Put behind a door or balanced on a window sash, it would sound the alarm when disturbed.
Air conditioner must have stopping devices installed to limit the elevation of the lower window sash to the height of the unit.
Modification of the window sash was accomplished off site.
Meeting rails and mullions must align with those of the primary window sash.
window sash are all one-over-one, typical of the period.
Select storm windows in custom colors or shop paint to match original window sash colors.
Remove all existing window sash, frames, trim and window treatments.
If the windows are swollen shut, remove the inside stop bead to free window sash.
Option bid items consist of wood repairs, wood window sash, and storm windows.
The minimum net clear opening of windows shall be determined without tilting out window sash.

British Dictionary definitions for window sash

noun

a glazed window frame, esp one that opens