Jump To:

• casement
  casement

  noun

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

  noun

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

casement

¹ American  

[kays-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.

---

Casement ² American  

[kays-muhnt] / ˈkeɪs mənt /

noun

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

---

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

---

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

---

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

See Examples For:

casement Casement

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

Past a covered front porch, the two-story home opens to wood-covered spaces with stained glass, pocketing doors, casement windows and built-ins.

From Los Angeles Times ● Dec. 17, 2020

I pulled, and pulled, at the door, and shook it till, massive as it was, it rattled in its casement.

From "Dracula" by Bram Stoker

In 1911, Casement was knighted by King George V for his humanitarian work - which took him from central Africa to some of the poorest parts of South America.

From BBC ● Oct. 22, 2026

With World War Two raging, Casement became attracted by the potential of an Irish-German alliance as a way of securing full Irish independence.

From BBC ● Oct. 22, 2026

Association chairperson Alan Daly said: "After many months of preparation, we have formally applied for the exhumation of Roger Casement to bring him home."

From BBC ● Oct. 22, 2026

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

General Jack Casement, in charge, came forward to greet Stanley.

From The Mountain Divide by Armand Both

Random Word

Spin the wheel and learn a new word!

---