window

1. window (noun) — sense 1

Definition: An opening, usually covered by one or more panes of clear glass, to allow light and air from outside to enter a building or vehicle.

Example: She opened the window to let some air in.

2. window (noun) — sense 2

Definition: An opening, usually covered by glass, in a shop which allows people to view the shop and its products from outside; a shop window.

Example: There is an hour or two, after the passengers have embarked, which is disquieting and fussy.[…]Passengers wander restlessly about or hurry, with futile energy, from place to place. Pushing men hustle each other at the windows of the purser's office, under pretence of expecting letters or despatching telegrams.

3. window (noun) — sense 3

Definition: The shutter, casement, sash with its fittings, or other framework, which closes a window opening.

4. window (verb) — sense 4

Definition: To furnish with windows.

5. window (verb) — sense 5

Definition: To place at or in a window.

Example: Wouldst thou be windowed in great Rome and see / Thy master thus with pleach'd arms, bending down / His corrigible neck?

6. window (verb) — sense 6

Definition: To apply a window function to (a signal).