Sill meaning

sĭl
A flattened piece of igneous rock forced between beds of stratified rocks.
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A sheet of igneous rock intruded between layers of older rock.
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(also window sill) A horizontal slat which forms the base of a window.

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

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A horizontal, structural member of a building near ground level on a foundation or pilings or lying on the ground in earth-fast construction and bearing the upright portion of a frame. Also spelled cill. Also called a ground plate, groundsill, sole, sole-plate, mudsill. An interrupted sill fits between posts instead of being below and supporting the posts in timber framing.
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(geology) A horizontal layer of igneous rock between older rock beds.
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A piece of timber across the bottom of a canal lock for the gates to shut against.
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(UK) A young herring.
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The shaft or thill of a carriage.
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The definition of a sill is a horizontal piece of a frame, generally made out of wood, for a window or door.

An example of a sill is where a cat may sit looking out the window.

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The horizontal member that bears the upright portion of a frame, especially the horizontal member that forms the base of a window.
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An approximately horizontal sheet of igneous rock intruded between older rock beds.
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A heavy, horizontal timber or line of masonry supporting a house wall, etc.
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A horizontal piece forming the bottom frame of the opening into which a window or door is set.
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Origin of sill

  • Middle English sille from Old English syll threshold
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Middle English sille, selle, sülle, from Old English syll, syl (“sill, threshold, foundation, base, basis"), from Proto-Germanic *sulÄ« (“bar, sill"), from Proto-Indo-European *sel-, *swel- (“beam, board, frame, threshold"). Cognate with Scots sil, sill (“balk, beam, floor, sill"), Dutch zul (“sill"), Low German Sull, Sülle (“threshold, ramp, 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, Latin silva (“wood, forest").
    From Wiktionary
  • Compare thill.
    From Wiktionary
  • Compare sile.
    From Wiktionary