The lowest member of the frame of a structure that rests on the foundation and supports the floor joists or uprights of the wall; the member forming the lower side of an opening, as in a door sill, window sill, etc.
Merriam-Webster Online Dictionary
sill (noun)1.
a horizontal piece (as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure as
a) the horizontal member at the base of a window
b) the threshold of a door
2.
a tabular body of igneous rock injected while molten between sedimentary or volcanic beds or along foliation planes of metamorphic rocks
3.
a submerged ridge at relatively shallow depth separating the basins of two bodies of water
sill (Wikipedia)
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Sill may refer to:
- Fort Sill, a United States Army post near Lawton, Oklahoma
- Mount Sill, a California mountain
- Sill, Swedish word for herring (the Norwegian and Danish equivalent is sild, the Icelandic is síld)
- Sill (dock), a weir at the low water mark retaining water within a dock
- Sill (geology), a subhorizontal sheet intrusion of molten or solidified magma
- Sill may also refer to the rise in depth near the mouth of a fjord caused by a terminal moraine
- Sill (geostatistics)
- Sill plate, a construction element
- Window sill, a more specific construction element than above
- Automotive sill, also known as a rocker; see Glossary of automotive design#R
- Sill (river), a river in Austria
- Sills Cummis & Gross (formerly Sills, Beck, Cummis, Radin, Tischman & Zuckerman), a U.S. corporate law firm