sill

sill

noun \ˈsil\

Definition of SILL

1

: a horizontal piece (as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure: as

a : the horizontal member at the base of a window

b : the threshold of a door

2

: a tabular body of igneous rock injected while molten between sedimentary or volcanic beds or along foliation planes of metamorphic rocks

3

: a submerged ridge at relatively shallow depth separating the basins of two bodies of water

Origin of SILL

Middle English sille, from Old English syll; akin to Old High German swelli beam, threshold

First Known Use: before 12th century

Other Building Terms

batten, cistern, hearth, lath, transom, wainscot

Rhymes with SILL

bill, brill, chill, dill, drill, fill, frill, gill, grill, grille, hill, ill, kill, krill, mil, mill, mille, nil, nill, Phil, pill, prill, quill, rill, shill, shrill, skill, spill, squill, still, swill, thill, thrill, til, till, trill, twill, vill, will

sill

noun    (Concise Encyclopedia)

In geology, a tabular igneous intrusion emplaced parallel to the bedding of the enclosing rock. Although they may have inclined orientations, nearly horizontal sills are most common. Sills may range from a few inches to hundreds of feet thick and up to hundreds of miles long. They include rock compositions of all types.

Variants of SILL

sill or sheet