sill

noun

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

Examples of sill in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
As the officers enter the home, the bird can be seen perched on a second-floor window sill, the video shows. Daniella Segura, Sacramento Bee, 28 Feb. 2025 Swarming: Termites that are reproducing can be found on window sills or attracted to lights. Ella Gonzales, Fort Worth Star-Telegram, 14 Feb. 2025 Bedrooms Window sills, baseboards, ceiling fan blades, and all surfaces of the bedroom should be dusted. Patricia Shannon, Southern Living, 9 Feb. 2025 In the Key of Ursa Minor Matthew Tierney Three fake plastic bushes per sill in the mall promenade. Max Ufberg, hazlitt.net, 10 Jan. 2025 See All Example Sentences for sill

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

Time Traveler
The first known use of sill was before the 12th century

Browse Nearby Words

Cite this Entry

“Sill.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sill. Accessed 13 Mar. 2025.

Kids Definition

sill

noun
1
: a horizontal piece (as a timber) that forms the lowest part of a supporting structure: as
a
: the horizontal piece at the base of a window
b
: the timber or stone at the foot of a door : threshold
2
: a flat mass of igneous rock injected while melted between other rocks

More from Merriam-Webster on sill

Last Updated: - Updated example sentences
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