: a window sash that opens on hinges at the side
also : a window with such a sash

Examples of casement 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.
The roomy entry foyer leads to a dramatic living area with a wall of north-facing casement windows. Matthew Sedacca, Curbed, 1 June 2026 Standard window types include double-hung, casement, and picture windows, each with distinct pros and cons. Roxanne Downer, USA Today, 22 Jan. 2026 However, both come with challenges for casement windows because the movement and position of casement windows is different from sliding or double-hung windows. Timothy Dale, The Spruce, 17 June 2026 Three leaves of the Constitution and the single sheet of the Bill of Rights lay horizontally in a marble and bronze casement elevated three feet off the floor. Literary Hub, 13 May 2026 See All Example Sentences for casement

Word History

Etymology

Middle English, hollow molding

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of casement was in the 15th century

Browse Nearby Words

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Cite this Entry

“Casement.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/casement. Accessed 7 Jul. 2026.

Kids Definition

1
: a window frame opening on hinges like a door
2
: a window with a casement

Biographical Definition

Casement

biographical name

Sir Roger David 1864–1916 Irish rebel

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