casement

¹ American  

[keys-muhnt] / ˈkeɪs mənt /

noun

1. a window sash opening on hinges that are generally attached to the upright side of its frame.

2. Also called casement window.  a window with such a sash or sashes.

3. a casing or covering.

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Casement ² American  

[keys-muhnt] / ˈkeɪs mənt /

noun

1. (Sir) Roger (David), 1864–1916, Irish patriot: hanged by the British for treason.

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casement ¹ British  

/ ˈkeɪsmənt /

noun

1. a window frame that is hinged on one side

2. a window containing frames hinged at the side or at the top or bottom

3. a poetic word for window

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Casement ² British  

/ ˈkeɪsmənt /

noun

1. Sir Roger ( David ). 1864–1916, British diplomat and Irish nationalist: hanged by the British for treason in attempting to gain German support for Irish independence

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Other Word Forms

• casemented adjective

Etymology

Origin of casement

1375–1425; late Middle English. See case ², -ment

Explanation

A casement is a type of window that swings open on a hinge, like a door. Open the casements in the kitchen and let the breeze come in! Before the invention of the sash window, which slides up and down, casements were very common. Today, you're more likely to see casement windows in European homes than in the U.S. Extremely old houses, especially those built before the 17th century, commonly have casement windows with leaded glass panes. Experts guess that the word casement comes from the Old French enchassement, "window frame."

Example Sentences

Just imagine a Tudor without its steel casement windows or a Craftsman without its solid built-in bookcases.

From Seattle Times • Jul. 25, 2023

"When it struck the quarters, the whole room shook and then the joy of somebody coming in, opening the casement, putting the rod in and winding it up," she said.

From BBC • Feb. 20, 2022

Dinner was served in a large, bright room off the open kitchen, its far wall dominated by a vast casement window.

From New York Times • Oct. 24, 2019

Cogitation’s far too grueling — throw it from the casement!

From Washington Post • Dec. 15, 2016

The moon had risen since they’d been outside, and light came through the casement windows on the second-floor landing.

From "Chasing Vermeer" by Blue Balliett