noun.
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noun.
An opening constructed in a wall, door, or roof that functions to admit light or air to an enclosure and is often framed and spanned with glass mounted to permit opening and closing.
noun.
A framework enclosing a pane of glass for such an opening; a sash.
noun.
A pane of glass or similar material enclosed in such a framework.
noun.
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noun.
An opening or transparent part that resembles a window in function or appearance.
noun.
The transparent panel on a window envelope.
noun.
The area or space immediately behind a window, especially at the front of a shop.
noun.
A means of access or observation.
noun.
An interval of time during which an activity can or must take place.
noun.
Strips of foil dropped from an aircraft to confuse enemy radar; chaff.
noun.
A range of electromagnetic frequencies that pass unobstructed through a planetary atmosphere.
noun.
A rectangular area on a screen in which a document, database, or application can be viewed independently of the other such areas.
noun.
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noun.
A launch window.
noun.
An area at the outer limits of the earth's atmosphere through which a spacecraft must pass in order to return safely.