From Longman Dictionary of Contemporary Englishcasementcase‧ment /ˈkeɪsmənt/ (also casement window) noun [countable] TBBa window that opens like a door with hinges at one side
Examples from the Corpus
casement• She found the curtained casement flung open to let in a stream of sunlight and fresh air.• Undoubtedly she thought of the window they stood at as a magic casement.• The two circular towers still have the original casement windows with leaded panes.• Her head was haloed in the sunlight pouring through the casement.• As usual, the casement opened on fog as white and blind as sleep.• The casement was splattered with bat lime, the wall covered with a long beard of it, almost to the floor.• Some kind of wind had risen outside and was whistling through the rotten window casement and the ill-fitted panes.• Window casements had been nailed shut and some were covered with clear polythene - an attempt at double glazing?Origin casement (1400-1500) Probably from Old North French encassement “frame”, from casse; → CASE1 