Window Sill definitions

Window sill

1) Construction terminology
Found on https://www.crosswordclues.com/clue/window-sill

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Window Sill

The bottom section of a window frame and/or the bottom section of an exterior masonry window opening.
Found on http://www.encyclo.co.uk/local/22192

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Window Sill

In architecture a window sill is a flat piece of wood, stone, or the like, at the bottom of a window frame.
Found on http://www.probertencyclopaedia.com/browse/TW.HTM

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Window Sill

The bottom section of a window frame and/or the bottom section of an exterior masonry window opening.
Found on http://www.selectstone.com/architectural-resources/stone-glossary/

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