casement

noun

case·​ment ˈkās-mənt 

: 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

Custom windows and doors built to last Renewal by Andersen offers a range of window styles, including double-hung, casement, awning, sliding, bay and bow windows, all custom-manufactured using Fibrex composite material designed for durability and energy efficiency. —Community's Choice Awards, Florida Times-Union, 7 Mar. 2026

The two bedrooms are on opposite ends of the apartment — ideal — and the rear bedroom is set up with a walk-in closet and dual exposures with oversize casement windows. —Matthew Sedacca, Curbed, 23 Feb. 2026

While egress windows can be designed using styles like casement or sliding windows, the defining feature is their code-compliant opening size and placement. —Roxanne Downer, USA Today, 22 Jan. 2026

Some of the patties come with laminated Haitian-style casements that are burnished in a deep fryer. —Helen Rosner, New Yorker, 4 Jan. 2026

Word History

Etymology

Middle English, hollow molding

First Known Use

15th century, in the meaning defined above

Rhymes for casement

• abasement
• debasement
• defacement
• displacement
• effacement
• emplacement
• encasement
• misplacement
• outplacement
• replacement
• basement
• placement

Kids Definition

casement

noun

case·​ment ˈkā-smənt 

1

: a window frame opening on hinges like a door

2

: a window with a casement

Biographical Definition

Casement

biographical name

Case·​ment ˈkās-mənt 

Sir Roger David 1864–1916 Irish rebel