case‧ment /ˈkeɪsmənt/ (
also ˈcasement ˌwindow)
noun [countable][
Date: 1400-1500;
Origin: Probably from Old North French encassement 'frame', from casse; ⇒ case1]
a window that opens like a door with
hinges at one side
[TahlilGaran] Dictionary of Contemporary English ▲