casement
US /ˈkeɪ.smənt/
UK /ˈkeɪ.smənt/
1.
a window or part of a window that opens on hinges along its side
:
•
She pushed open the wooden casement to let in the fresh air.
•
The old house had many small casement windows.
a window or part of a window that opens on hinges along its side