sill
Pronunciation Noun

sill (plural sills)

  1. (architecture) (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.
  2. (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.
  3. (geology) A horizontal layer of igneous rock between older rock beds.
  4. A piece of timber across the bottom of a canal lock for the gates to shut against.
  5. (anatomy) A raised area at the base of the nasal aperture in the skull.
    the nasal sill
  6. (military, historical) The inner edge of the bottom of an embrasure.
Related terms Translations Translations Translations
  • German: Lagergang, Sill
  • Russian: силл
  • Spanish: lámina
Noun

sill (plural sills)

  1. (UK) A young herring.
Noun

sill (plural sills)

  1. The shaft or thill of a carriage.

Sill
Proper noun
  1. Surname



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