sill

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Noun sill has 2 senses

sill - structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
--₁ is a kind of structural member
--₁ has particulars: doorsill, doorstep, threshold; windowsill
sill - (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
--₂ is a kind of rock, stone

silky elm silky oak silky pocket mouse silky tamarin silky terrier silky willow silky wisteria sill, sill silla sillabub sillaginidae sillago sillhouette sillier silliest silliloqy

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