win·dow
| \ ˈwin-(ˌ)dō
\
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Definition of window
1a
: 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 (such 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 (such 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 (such as a shutter or sash with its fittings) that closes a window opening
6
: chaff sense 4
7
: a range of wavelengths in the electromagnetic spectrum to which a planet's atmosphere is transparent
8a
: 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
out the window
: out of existence, use, or consideration