SILL
- a part of a window [n -S]
- tabular body of igneous rock injected while molten between sedimentary or volcanic beds or along foliation planes of metamorphic rocks
- submerged ridge at relatively shallow depth separating the basins of two bodies of water
- horizontal piece beneath a window or door
- the horizontal piece at the base of a window [n SILLS]
- a horizontal piece (as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure as
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