English dictionary

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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 categorygeology

Based on WordNet 3.0 copyright © Princeton University.
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