| 1. | an opening in the wall of a building, the side of a vehicle, etc., for the admission of air or light, or both, commonly fitted with a frame in which are set movable sashes containing panes of glass. |
| 2. | such an opening with the frame, sashes, and panes of glass, or any other device, by which it is closed. |
| 3. | the frame, sashes, and panes of glass, or the like, intended to fit such an opening: Finally the builders put in the windows. |
| 4. | a windowpane. |
| 5. | anything likened to a window in appearance or function, as a transparent section in an envelope, displaying the address. |
| 6. | a period of time regarded as highly favorable for initiating or completing something: Investors have a window of perhaps six months before interest rates rise. |
| 7. | Military. chaff 1 (def. 5). |
| 8. | Geology. fenster. |
| 9. | Pharmacology. the drug dosage range that results in a therapeutic effect, a lower dose being insufficient and a higher dose being toxic. |
| 10. | Aerospace.
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| 11. | Computers. a section of a display screen that can be created for viewing information from another part of a file or from another file: The split screen feature enables a user to create two or more windows. |
| 12. | to furnish with a window or windows. |
| 13. | Obsolete. to display or put in a window. |
window
window win·dow (wĭn'dō)
n.
A fenestra.