Hopper window
A sash hinged at the bottom that tilts open inward from the top.
What it means for you
Small, secure, and it seals tight like a casement — which is why it's the classic basement and small-bathroom window. It opens into the room, and driving rain can get in if you leave it open.
Where you'll see it
Basements and small baths; often the operable unit in a below-grade egress well.
Related terms
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