From Biology-Online Dictionary | Biology-Online Dictionary


1. An opening in the wall of a building for the admission of light and air, usually closed by casements or sashes containing some transparent material, as glass, and capable of being opened and shut at pleasure. I leaped from the window of the citadel. (Shak) Then to come, in spite of sorrow, And at my window bid good morrow. (milton)

2. The shutter, casement, sash with its fittings, or other framework, which closes a window opening.

3. A figure formed of lines crossing each other. Till he has windows on his bread and butter. (king) french window, the common European martin. Window tax, a tax or duty formerly levied on all windows, or openings for light, above the number of eight in houses standing in cities or towns.

Origin: OE. Windowe, windoge, Icel. Vindauga window, properly, wind eye; akin to Dan. Vindue. See Wind, and Eye.