Stool of a window
Related to Stool of a window: Window Sill
| (Arch.) | the flat piece upon which the window shuts down, and which corresponds to the sill of a door; in the United States, the narrow shelf fitted on the inside against the actual sill upon which the sash descends. This is called a window seat when broad and low enough to be used as a seat. |
See also: Stool
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.