Sill

Definitions

1. A breast wall; window breast; horizontal brink which forms the base of a window.
2. A young herring.
   UK
3. The shaft or thill of a carriage.
4. A surname.
5. A threshold; horizontal structural member of a building near ground level on a foundation or pilings, or lying on the ground, and bearing the upright portion of a frame; a sill plate.
6. A stratum of rock, especially an intrusive layer of igneous rock lying parallel to surrounding strata.
7. A threshold or brink across the bottom of a canal lock for the gates to shut against.
8. A raised area at the base of the nasal aperture in the skull.
9. The inner edge of the bottom of an embrasure.
   historical

Equivalents

Examples

“She looked out the window resting her elbows on the window sill.”

“Minor palingenetic magmas probably were generated at this time and intruded the mantling rocks in the form⟳ of small sills and apophyses […].”

“The molten rock in the sills may have⟳ ignited vast reserves of shallowly buried natural gas, much like⟳ a match⟳ applied to a gas barbecue.”

“the nasal sill”

CEFR level