What is the difference between Sill and Crest?

The difference between sill and crest

is that "sill" is a horizontal slat which forms the base of a window and "crest" is the summit of a hill or mountain ridge.




  • (architecture) (also window sill) A horizontal slat which forms the base of a window.
  • (construction) 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 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.
  • (anatomy) A raised area at the base of the nasal aperture in the skull.
  • (military, historical) The inner edge of the bottom of an embrasure.

Related terms

  • lintel
  • plate sense #13 (construction)


  • She looked out the window resting her elbows on the window sill.
  • Minor palingenetic magmas probably were generated at this time and intruded the mantling rocks in the form of small sills and apophyses; […]
  • the nasal sill


  • The summit of a hill or mountain ridge.
  • A tuft, or other natural ornament, growing on an animal’s head, for example the comb of a cockerel, the swelling on the head of a snake, the lengthened feathers of the crown or nape of bird, etc.
  • The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.
  • (heraldry) A bearing worn, not upon the shield, but usually on a helmet above it, sometimes (as for clerics) separately above the shield or separately as a mark for plate, in letterheads, and the like.
  • The upper curve of a horse’s neck.
  • The ridge or top of a wave.
  • The helm or head, as typical of a high spirit; pride; courage.
  • The ornamental finishing which surmounts the ridge of a roof, canopy, etc.
  • The top line of a slope or embankment.
  • (anatomy) A ridge along the surface of a bone.
  • (informal) A design or logo, especially one of an institution, association or high-class family.
  • Any of several birds in the family Regulidae, including the goldcrests and firecrests.


  • (skin on head of birds): comb, cockscomb

Coordinate terms

  • (skin on head of birds): caruncle, snood, wattle


  • I liked the man for his own sake, and even had he promised to turn out a celebrity it would have had no weight with me. I look upon notoriety with the same indifference as on the buttons on a man’s shirt-front, or the crest on his note-paper.
  • Hungry for fame and the approval of rare-animal collector Queen Victoria , Darwin deceives the Captain and his crew into believing they can get enough booty to win the pirate competition by entering Polly in a science fair. So the pirates journey to London in cheerful, blinkered defiance of the Queen, a hotheaded schemer whose royal crest reads simply “I hate pirates."


  • (intransitive) Particularly with reference to waves, to reach a peak.
  • (transitive) To reach the crest of (a hill or mountain)
  • To furnish with, or surmount as, a crest; to serve as a crest for.
  • To mark with lines or streaks like waving plumes.


  • the land rolls gently, so that, upon cresting a low rise or passing a copse of wind turbines, you suddenly spot a lot full of lorries or a complex of gigantic sheds.
  • His legs bestrid the ocean, his reared arm / Crested the world.
  • groves of clouds that crest the mountain’s brow
  • Like as the shining skie in summers night,What time the dayes with scorching heat abound,Is creasted all with lines of firie light