dormer-window

A small porthole-sized side window in the C-pillar of certain cars, popular in the 1970s.

plural of opera window

(freestyle skiing slang) windmill-like flailing of one's arms in a circular motion to maintain balance while in the air after a jump

(US) A window cleaner; a person who cleans windows for a living.

plural of window washer

The inside face of the low, and usually thin, piece of wall between the window sill and the floor below.

A circular window having radiating mullions arranged like the spokes of a wheel.

(UK, dialect) The common European martin.

(anatomy) The oval window.