window

1. (architecture) The shutter, casement, sash with its fittings, or other framework, which closes a window opening.countableuncountable

2. (figurative) A period of time when something is available or possible; a limited opportunity.Examples: "launch window"; "window of opportunity"; "You have a two-hour window of clear weather to finish working on the lawn."countablefigurativelyuncountable

3. (figurative) Something that allows one to see through or into somethingExamples: "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."countablefigurativelyuncountable

4. (graphical user interface) A 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.countableuncountable

5. (medicine) The time between first infection and detectability.countableuncountable

6. (military, historical, uncountable) Synonym of chaff (“strips of material intended to confuse radar”)Synonyms: chaffhistoricaluncountable