casement
noun
a window sash opening on hinges that are generally attached to the upright side of its frame.
casement
1 American
[keys-muhnt]
/ ˈkeɪs mənt /
noun
-
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.
Casement
2
American
[keys-muhnt]
/ ˈkeɪs mənt /
noun
casement
1
British
/ ˈkeɪsmənt /
noun
-
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
Casement
2
British
/ ˈkeɪsmənt /
noun
Other Word Forms
Etymology
Origin of casement
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."
Vocabulary lists containing casement
"The Highwayman"
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The Merchant of Venice
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As You Like It
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
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
The bedrooms all have tall casement windows that open out for the breeze and transom windows for extra natural light.
From Washington Post ● Dec. 1, 2021
“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
Roy Lee gently took the funnel from Mom’s hand and inserted it into the Auk casement.
From "October Sky" by Homer Hickam
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
In her speech, O'Neill also reaffirmed her party's commitment to the Casement Park GAA stadium project in west Belfast.
From BBC ● Apr. 24, 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
Depression is one of the leading causes of disability among people ages 16 to 24, Casement said.
From Science Daily ● Jan. 7, 2026
In 1904, this policy of reticence was abandoned, and the historic report of Consul Roger Casement confirmed, and in some ways amplified, all that had reached Europe from other sources.
From The Crime of the Congo by Sir Arthur Conan Doyle
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.
