windownoun/ˈwɪndəʊ/

• 1

  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.

  • She opened the window to let some air in.
  • But then I had the [massive] flintlock by me for protection. ¶[…]The linen-press and a chest on the top of it formed, however, a very good gun-carriage; and, thus mounted, aim could be taken out of the window at the old mare feeding in the meadow below by the brook, and a 'bead' could be drawn upon Molly, the dairymaid, kissing the fogger behind the hedge,[…].
• 2

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

  • 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

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

• 4

  A period of time when something is available or possible; a limited opportunity.

  • launch window
  • window of opportunity
• 5

  Something that allows one to see through or into something.

  • His journal provides a rare window into his otherwise obscure life.
  • Then we read Spear's confrontational commentary on the "Richard Pryor Incident" from the Black perspective...and suddenly we began to feel that GCN's window on the Gay World was something we couldn't live without since no other Gay Media voice seemed so speaking.
• 6

  A restricted range.

  • In this case, a band-pass filter using a range or window of frequencies is appropriate to isolate the frequency or the group of frequencies that characterize a specific cycle.
• 7

  computingengineeringgraphical-user-interfaceA rectangular area on a computer terminal or screen containing some kind of user interface, displaying output and allowing input, often for a single task in a multitasking system.

• 8

  A figure formed of lines crossing each other.

  • till he has windows on his bread and butter

windowverb/ˈwɪndəʊ/

• 1

  To furnish with windows.

• 2

  To place at or in a window.

  • Wouldst thou be windowed in great Rome and see / Thy master thus with pleach'd arms, bending down / His corrigible neck?
• 3

  computingengineeringmathematicsTo apply a window function to (a signal).