English noun: sill | |||
1. | sill (artifact) structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure | ||
Broader (hypernym) | structural member | ||
Narrower (hyponym) | doorsill, doorstep, threshold, windowsill | ||
2. | sill (object) (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock | ||
Broader (hypernym) | rock, stone | ||
Domain category | geology | ||