a window sash opening on hinges that are generally attached to the upright side of its frame.
Also called casement window. a window with such a sash or sashes.
a casing or covering.
a window frame that is hinged on one side
a window containing frames hinged at the side or at the top or bottom
a poetic word for window
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."
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Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It also comes complete with two staircases, window seats, and casement windows.
From MarketWatch ● Jun. 26, 2026
"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
“We added casement windows with screens so that it could be a four-season porch and we could enjoy it all year long,” said Baudoin.
From Seattle Times ● Jul. 6, 2021
In the roughly 400-square-foot central living room, light pours through casement windows, revealing another series of signature elements.
From New York Times ● Feb. 18, 2020
The real moon shone through the casement window.
From "The Graveyard Book" by Neil Gaiman
As for his government's record on support for sport in Northern Ireland, £50m was made available towards the long-awaited redevelopment of Casement Park in June 2025.
From BBC ● Jul. 20, 2026
Depression is one of the leading causes of disability among people ages 16 to 24, Casement said.
From Science Daily ● Jan. 7, 2026
"Instead of being a morning lark you're going to become more of a night owl," Casement explained.
From Science Daily ● Jan. 7, 2026
The executive had previously committed £62m towards the construction of Casement Park.
From BBC ● Jan. 6, 2026
Gilbert did not leave London, as he had intended, for Sir Geoffrey Mundane definitely decided to produce "The Magic Casement" in succession to the play which was then being performed at his theatre.
From Changing Winds A Novel by Ervine, St. John G. (St. John Greer)
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
