A window enabling a prison guard to see into a cell without being seen by the prisoner.

plural of rose window

(management) Describing a service operation at which all of a customer's needs may be satisfied by a single server, without waiting in a second queue.

plural of window frame

plural of garret window

plural of bow window

plural of window dresser

(space science) A period of time during which a spacecraft orbiting one celestial body can travel to a different body and enter orbit around it without excessive expenditure of fuel or reaction mass.

Alternative spelling of window seat

A typically soft seat placed in a recess, for a window, in a wall, and filling the recess. / A seat beside a window in public transport, as in a bus, train or passenger aircraft.