window.
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.
Meaning & usage
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.
An opening, usually covered by glass, in a shop which allows people to view the shop and its products from outside; a shop window.
The shutter, casement, sash with its fittings, or other framework, which closes a window opening.
A period of time when something is available or possible; a limited opportunity.
launch window
window of opportunity
Something that allows one to see through or into something.
His journal provides a rare window into his otherwise obscure life.
A restricted range.
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.
A figure formed of lines crossing each other.
The time between first infection and detectability.
Synonym of chaff (“strips of material intended to confuse radar”)
A function multiplied with a signal to reduce spectral leakage when performing a Fourier transform.
A fenster: a geologic or tectonic window.
Where this word comes from
Etymology tree Proto-Indo-European *h₂weh₁- Proto-Indo-European *-ti Proto-Indo-European *h₂wḗh₁ti Proto-Indo-European *h₂wéh₁n̥ts Proto-Germanic *windaz Old Norse vindr Proto-Indo-European *h₃ekʷ-der. Proto-Germanic *augô Proto-Norse *ᚨᚢᚷᚨ (*auga) Old Norse auga Old Norse vindaugabor. Middle English wyndowe English window From Middle English wyndowe, wyndown, from Old Norse vindauga (“window”, literally “wind-eye; wind-hole”), equivalent to wind + eye. Cognate with Scots windae and windock, Faroese vindeyga, Norwegian Bokmål vindu, Norwegian Nynorsk vindauge, Danish vindue, archaic Swedish vindöga, Elfdalian windog. Displaced native Old English ēagþȳrel (literally “eye hole”) (the rare direct descendant is eyethurl (“window, pupil, etc.”)). The “windows” among early Germanic peoples were just unglazed holes (eyes) in the wall or roof that permitted wind to pass through .
To furnish with windows.
To place at or in a window.
To apply a window function to (a signal).
Where this word comes from
Etymology tree Proto-Indo-European *h₂weh₁- Proto-Indo-European *-ti Proto-Indo-European *h₂wḗh₁ti Proto-Indo-European *h₂wéh₁n̥ts Proto-Germanic *windaz Old Norse vindr Proto-Indo-European *h₃ekʷ-der. Proto-Germanic *augô Proto-Norse *ᚨᚢᚷᚨ (*auga) Old Norse auga Old Norse vindaugabor. Middle English wyndowe English window From Middle English wyndowe, wyndown, from Old Norse vindauga (“window”, literally “wind-eye; wind-hole”), equivalent to wind + eye. Cognate with Scots windae and windock, Faroese vindeyga, Norwegian Bokmål vindu, Norwegian Nynorsk vindauge, Danish vindue, archaic Swedish vindöga, Elfdalian windog. Displaced native Old English ēagþȳrel (literally “eye hole”) (the rare direct descendant is eyethurl (“window, pupil, etc.”)). The “windows” among early Germanic peoples were just unglazed holes (eyes) in the wall or roof that permitted wind to pass through .
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.