1 Part of a wall projecting from its face, a partial ellipse, semicircle, or segment on plan, usually with a window set in it or extending the full width, known as a bow- or compass-window. If the plan is canted (or part of a polygon), or rectangular, it is not called a bow, but rather a bay, so a projecting window would be a canted bay-window or a rectangular or square bay-window. See bay-window.
2 Arched form, therefore part of a flying buttress.
3 Attribute of the goddess Diana, and therefore associated with hunting.