window
WIHN-doh
Window (noun) means an opening in a wall, usually fitted with glass, that lets in light and air. Example: “She opened the window to let in some fresh air.”
noun
1
An opening in a wall, usually fitted with glass, that lets in light and air.
"She opened the window to let in some fresh air."
"Rain streaked down the office window all afternoon."
"The cat sat on the sill and stared out of the window at the birds."
2
A limited period during which something is possible or available.
"The weather forecast shows a brief window of sunshine tomorrow morning."
"Once the sale opens, you have a short window to claim the discount."
"There's only a small window to submit your application."
3
A rectangular area on a computer screen displaying an app or task.
"Click the small cross in the corner to close the window."
"I dragged the document into a separate window so I could compare both."
"He had six browser windows open at once."
How to use window
Learner’s notesIn plain EnglishA glass opening in a wall, a limited timeframe for doing something, or a screen panel in software.
Common pairings
open a window
a window of opportunity
browser window
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Word forms
- Plural
- windows
- Third person singular
- windows
- Past tense
- windowed
Fill the gap
Can you complete this real example?
She opened the _____ to let in some fresh air.
Etymology
From Old Norse vindauga, literally "wind-eye" — an opening that let wind (and light) into a building, before glass panes were common.
Synonyms
View more →Related words
Frequently asked questions
What does “window” mean?
The word “window” means an opening in a wall, usually fitted with glass, that lets in light and air. In plain terms, a glass opening in a wall, a limited timeframe for doing something, or a screen panel in software.
How do you pronounce “window”?
“Window” is pronounced WIHN-doh (/ˈwɪndoʊ/ in IPA).
How do you use “window” in a sentence?
Here is “window” used in a sentence: “She opened the window to let in some fresh air.”
What is another word for “window”?
Words with a similar meaning to “window” include glass.
What part of speech is “window”?
“Window” is a noun.
Where does the word “window” come from?
The word “window” comes from Old Norse. From Old Norse vindauga, literally "wind-eye" — an opening that let wind (and light) into a building, before glass panes were common.
Is “window” a common word?
“Window” is a very common word in modern English, usually learned at around the A1 level.
How many meanings does “window” have?
“Window” has 3 distinct senses listed in this dictionary. The most common is: an opening in a wall, usually fitted with glass, that lets in light and air.
What are the types of windows?
Common styles include casement windows, hinged at the side; sash windows, which slide up and down; sliding windows, which move sideways; bay and bow windows, which project outward; and fixed or picture windows that do not open. Each balances light, ventilation, and appearance differently to suit the building.
What is the difference between a window and a skylight?
A window is an opening set in a wall, letting in light and air from the side. A skylight is a window fitted into a roof or ceiling, bringing light from above. Both use glass, but their position differs: windows look outward, while skylights look up to the sky.
Why are windows important in a building?
Windows let in natural light and fresh air, reducing the need for artificial lighting and improving ventilation. They offer views, connect indoor spaces to the outside, and affect a building's warmth, energy use, and mood. Well-placed windows can make rooms feel larger, brighter, and more comfortable to occupy.
Does window have other meanings?
Yes. Beyond the opening in a wall, window can mean a period of opportunity, as in a launch window or a window of time; a framed area on a computer screen; or a transparent panel in an envelope. Each borrows the idea of an opening you can see or act through.
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