sill

[ sil ]
See synonyms for sill on Thesaurus.com
noun
  1. a horizontal timber, block, or the like serving as a foundation of a wall, house, etc.

  2. the horizontal piece or member beneath a window, door, or other opening.

  1. Geology. a tabular body of intrusive igneous rock, ordinarily between beds of sedimentary rocks or layers of volcanic ejecta.

Origin of sill

1
before 900; Middle English sille,Old English syl, sylle; cognate with Low German süll,Old Norse syll; akin to German Schwelle sill

Other words from sill

  • sill-like, adjective
  • un·der·sill, noun

Words Nearby sill

Other definitions for Sill (2 of 2)

Sill
[ sil ]

noun
  1. Mount, a mountain in E central California, in the Sierra Nevada Mountains. 14,153 feet (4,314 meters).

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use sill in a sentence

British Dictionary definitions for sill

sill

/ (sɪl) /


noun
  1. a shelf at the bottom of a window inside a room

  2. a horizontal piece along the outside lower member of a window, that throws water clear of the wall below

  1. the lower horizontal member of a window or door frame

  2. a continuous horizontal member placed on top of a foundation wall in order to carry a timber framework

  3. a flat usually horizontal mass of igneous rock, situated between two layers of older sedimentary rock, that was formed by an intrusion of magma

Origin of sill

1
Old English syll; related to Old Norse svill sill, Icelandic svoli tree trunk, Old High German swella sill, Latin solum ground

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for sill

sill

[ sĭl ]


  1. A sheet of igneous rock intruded between layers of older rock. See illustration at batholith.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.