Meaning ofsillin English

Noun

1. a threshold at a canal lock's bottom; for gates
2. a horizontal slat at a window's base
3. a building's horizontal structural member near ground level
   The window sill was made of white marble.
4. a layer of igneous rock between older beds
   A sill of basalt formed a hard layer in the geological formation.
5. a horizontal beam at the base of a window; threshold
   The carpenter installed a new sill under the old window.
6. a piece of timber in a canal lock
   The lock gate rested on a sill to prevent leakage.
7. a foundation or base plate in construction
   The builder laid a sill under the door frame.
8. a layer of rock; especially igneous rock
   The geologist discovered a sill of granite in the mountain.