An example of a sill is where a cat may sit looking out the window.
- a heavy, horizontal timber or line of masonry supporting a house wall, etc.
- a horizontal piece forming the bottom frame of the opening into which a window or door is set
- Geol. a flattened piece of igneous rock forced between beds of stratified rocks
Origin of sillMiddle English sille ; from Old English syll, akin to Danish sville, German schwelle ; from Indo-European base an unverified form sel-, an unverified form swel-, beam, plank from source Classical Greek selma, beam
- The horizontal member that bears the upright portion of a frame, especially the horizontal member that forms the base of a window.
- Geology An approximately horizontal sheet of igneous rock intruded between older rock beds.
Origin of sillMiddle English sille, from Old English syll, threshold.
- (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.
- 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.
- (geology) A horizontal layer of igneous rock between older rock beds.
- A piece of timber across the bottom of a canal lock for the gates to shut against.
From Middle English sille, selle, sÃ¼lle, 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, SÃ¼lle (“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").
- (UK) A young herring.