sill

[ sil ]
/ sɪl /

noun

a horizontal timber, block, or the like serving as a foundation of a wall, house, etc.
the horizontal piece or member beneath a window, door, or other opening.
Geology. a tabular body of intrusive igneous rock, ordinarily between beds of sedimentary rocks or layers of volcanic ejecta.

Origin of sill

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

Definition for sill (2 of 2)

Sill
[ sil ]
/ sɪl /

noun

Mount, a mountain in E central California, in the Sierra Nevada Mountains. 14,153 feet (4314 meters).

Example sentences from the Web for sill

British Dictionary definitions for sill

sill
/ (sɪl) /

noun

a shelf at the bottom of a window inside a room
a horizontal piece along the outside lower member of a window, that throws water clear of the wall below
the lower horizontal member of a window or door frame
a continuous horizontal member placed on top of a foundation wall in order to carry a timber framework
a flat usually horizontal mass of igneous rock, situated between two layers of older sedimentary rock, that was formed by an intrusion of magma

Word Origin for sill

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

Scientific definitions for sill

sill
[ sĭl ]

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