sill

Meanings

1. 1
   noun

   A breast wall; window breast; horizontal brink which forms the base of a window.

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

2. 2
   noun

   A stratum of rock, especially an intrusive layer of igneous rock lying parallel to surrounding strata.

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

3. 3
   noun

   A raised area at the base of the nasal aperture in the skull.

   The nasal sill.

4. 4
   noun

   structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure

From Middle English sille, selle, sülle, from Old English syll, syl (“sill, threshold, foundation, base, basis”), from Proto-Germanic *sulī (“bar, sill”), from Proto-Indo-European *sel-, *swel- (“beam, board, frame, threshold”). Cognate with Scots sil, sill (“balk, beam, floor, sill”), Dutch zulle (“sill”), Low German Sull, Sülle (“threshold, ramp, sill”), German Süll, Sülle (“threshold, sill”), Danish syld (“base of a framework building”), Swedish syll (“joist, cross-tie”), Norwegian syll, Icelandic syll, sylla (“sill”). Related also to German Schwelle ( > Danish svelle), Old Norse svill, Lat...

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