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Window \ˈwin-(ˌ)dō\

Etymology: Middle English windowe, from Old Norse vindauga,from vindr wind (akin to Old English wind) + auga eye; akin to Old English ēage eye

Date: 13th century

1 a : an opening especially in the wall of a building for admission of light and air that is usually closed by casements or sashes containing transparent material (as glass) and capable of being opened and shut

b : windowpane

c : a space behind a window of a retail store containing displayed merchandise

d : an opening in a partition or wall through which business is conducted <a bank teller's window>

2: a means of entrance or access; especially : a means of obtaining information <a window on history>

3: an opening (as a shutter, slot, or valve) that resembles or suggests a window

4: the transparent panel or opening of a window envelope

5: the framework (as a shutter or sash with its fittings) that closes a window opening

6: chaff

7: a range of wavelengths in the electromagnetic spectrum to which a planet's atmosphere is transparent

8 a : an interval of time within which a rocket or spacecraft must be launched to accomplish a particular mission

b : an interval of time during which certain conditions or an opportunity exists <a window of vulnerability>

9: an area at the limits of the earth's sensible atmosphere through which a spacecraft must pass for successful reentry

10: any of various rectangular boxes appearing on a computer screen that display files or program output, that can usually be moved and resized, and that facilitate multitasking

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