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sill | |
1. n. (architecture) (also window sill) A horizontal slat which forms the base of a window. |  |
She looked out the window resting her elbows on the window sill. |  |
2. n. (construction) A horizontal, structural member of a building near ground level on a foundation or pilings or lying on the ground in earth-fast construction and bearing the upright portion of a frame. |  |
3. n. (geology) A horizontal layer of igneous rock between older rock beds. |  |
4. n. A piece of timber across the bottom of a canal lock for the gates to shut against. |  |
5. n. (anatomy) A raised area at the base of the nasal aperture in the skull. |  |
the nasal sill |  |
6. n. (military, historical) The inner edge of the bottom of an embrasure. |  |
7. n. (UK) A young herring. |  |
8. n. The shaft or thill of a carriage. |  |