from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The horizontal member at the base of a window opening.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The horizontal member protruding from the base of a window frame
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the sill of a window; the horizontal member at the bottom of the window frame
window + sill (Wiktionary)