A period of time, often in which a task is to be done

A window that opens and closes by sliding a pane, as opposed to folding in or out. / (programming) A descriptor for a data analysis technique where overlapping windows of data of fixed size are analyzed.

Alternative form of out the window

Alternative form of window of opportunity

(architecture) A large semicircular window, characteristic of the enormous public baths (thermae) of Ancient Rome.

plural of window stool

(architecture) A horizontal board, usually made of wood, on a windowsill, fitted against the bottom rail of the lower sash.

plural of lattice window

plural of Diocletian window

Alternative spelling of windowsill