A casement or a casement window is a window that opens by means of hinges, usually at the side.
[written]
casement in British English
(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
Word origin
C15: probably from Old Northern French encassement frame, from encasser to frame, encase, from casse framework, crate, case2
Casement in British English
(ˈkeɪsmənt)
noun
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
Casement in American English
(ˈkeɪsmənt)
Sir Roger David1864-1916; Ir. nationalist: hanged by the British as a traitor in WWI
casement in American English
(ˈkeɪsmənt)
noun
1.
a window frame that opens on hinges along the side: a casement window often has two such frames, opening like French doors
2.
a casing; covering
Derived forms
casemented (ˈcasemented)
adjective
Word origin
ME aphetic for OFr dial *encassement (OFr enchassement) < en-, en-1 + casse, case2 + -ment, -ment