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in an otherwise solid, opaque surface through which light and sometimes air can pass. For example, a window in the wall of a house, or a window in a scientific measurement device that permits reading of certain wavelengths.Window is also used metaphorically to refer to a time period during which something can occur and outside of which the thing cannot occur, as in a window of opportunity to launch a rocket to the moon on the most efficient trajectory.The word Window dates back to Old Norse "Wind Eye"; opening to the air. See more at Wikipedia.org...

e or framework is a structural skeleton, which supports the other components of the object. It is used in this basic sense in art, construction, and mechanical engineering, and the expression 'frame' for eyeglasses.in art, a picture frame is a solid border around a picture or paintinga space frame in constructiona beehive framein mechanical engineering, a bicycle frame, for instanceframes are often called after a shape they resemble, e.g. an A-frame, often used as a caning -, whipping - or flogging frame, used for securing the victim of physical punishment (either standing with his hands tied where the side bars meet above him, or to bend over the shorter cross-bar) See more at Wikipedia.org...