D defs.my
Entry 2 senses Webster, 1913

Bay window

/bā wĭn'-dō/ · Bay· win·dow · IPA
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;…
  1. 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
  2. 2.
    a protruding abdomen.[informal]