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From WikiWord, the free dictionary

/ˈwɪndəʊ/ English

Definitions

The inedible parts of a grain-producing plant.“To separate out the chaff, early cultures tossed baskets of grain into the air and let the wind blow away the lighter chaff.”
Straw or hay cut up fine for the food of cattle.
Any excess or unwanted material, resource, or person; anything worthless.
Light jesting talk; banter; raillery.

An opening, usually covered by one or more panes of clear glass, to allow light and air from outside to enter a building or vehicle.
An opening, usually covered by glass, in a shop which allows people to view the shop and its products from outside; a shop window.
The shutter, casement, sash with its fittings, or other framework, which closes a window opening.
A period of time when something is available.“launch window; window of opportunity; You have a two-hour window of clear weather to finish working on the lawn.”