01 A window forming a bay or recess in a room, and projecting outward from the wall, either in a rectangular, polygonal, or semicircular form;…
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1.
A window forming a bay or recess in a room, and projecting outward from the wall, either in a rectangular, polygonal, or semicircular form; -- often corruptly called a bow window.(Arch.) Also: bow window
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2.
a protruding abdomen.[informal]