sill
noun
ˈsil 
1
: a horizontal piece (such as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure: such 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
Example Sentences
Recent Examples on the Web Available in solid copper or brass, the 10-ounce mister from Haws will look great on a shelf, end table or window sill. 
Alyssa Gautieri, Good Housekeeping, 1 Sep. 2022 In one incident, around 11 p.m. on Aug. 10, police said two benches, a window sill and a 5-foot-6-inch statue of the school’s namesake, St. Anthony, were destroyed. Lauren Lumpkin, Washington Post, 18 Aug. 2022 That list includes an AMG Night package and AMG Night package II, which brings the high-gloss black look to the front splitter and trim elements, like the AMG side sill panel inserts, the window line trim strip and the exterior mirror housings. Sebastian Blanco, Car and Driver, 15 May 2022 The agency is planning to close this outlet with a rock sill. Boyce Upholt, Wired, 23 July 2022 The 20-inch wheels feature a copper hue, while the special edition also adds a carbon-fiber lip spoiler and rear diffuser, as well as black side sill trim and exterior badging. Caleb Miller, Car and Driver, 5 July 2022 As these images show, the new car retains Range Rover’s characteristic falling roofline, strong waist with its horizontal emphasis and lower rising sill. Nargess Banks, Forbes, 26 Oct. 2021 If possible, slope the window sill downwards, so water easily drains off. Nafeesah Allen, Better Homes & Gardens, 10 May 2022 Most window planters are made of high-density polypropylene, wood, or metal—and sometimes ceramic or clay—and they're generally made to sit on the window sill. Rachel Klein, Popular Mechanics, 1 June 2022 See More
Alyssa Gautieri, Good Housekeeping, 1 Sep. 2022 In one incident, around 11 p.m. on Aug. 10, police said two benches, a window sill and a 5-foot-6-inch statue of the school’s namesake, St. Anthony, were destroyed. Lauren Lumpkin, Washington Post, 18 Aug. 2022 That list includes an AMG Night package and AMG Night package II, which brings the high-gloss black look to the front splitter and trim elements, like the AMG side sill panel inserts, the window line trim strip and the exterior mirror housings. Sebastian Blanco, Car and Driver, 15 May 2022 The agency is planning to close this outlet with a rock sill. Boyce Upholt, Wired, 23 July 2022 The 20-inch wheels feature a copper hue, while the special edition also adds a carbon-fiber lip spoiler and rear diffuser, as well as black side sill trim and exterior badging. Caleb Miller, Car and Driver, 5 July 2022 As these images show, the new car retains Range Rover’s characteristic falling roofline, strong waist with its horizontal emphasis and lower rising sill. Nargess Banks, Forbes, 26 Oct. 2021 If possible, slope the window sill downwards, so water easily drains off. Nafeesah Allen, Better Homes & Gardens, 10 May 2022 Most window planters are made of high-density polypropylene, wood, or metal—and sometimes ceramic or clay—and they're generally made to sit on the window sill. Rachel Klein, Popular Mechanics, 1 June 2022 See More Word History
Etymology
Middle English sille, from Old English syll; akin to Old High German swelli beam, threshold
First Known Use
before the 12th century, in the meaning defined at sense 1
Kids Definition
sill
noun
ˈsil
1
: a heavy horizontal piece (as of wood) that forms the bottom part of a window frame or a doorway
2
: a horizontal supporting piece at the base of a structure
sills
noun
as in beams
Synonyms & Similar Words
Relevance
- beams
- staves
- braces
- timbers
- splints
- stakes
- sticks
- piles
- lumber
- posts
- woods
- billets
- blocks
- ridgepoles
- bars
- firewoods
- cordwoods