Try Our Apps


What is the origin of "February"?


[win-dohz] /ˈwɪn doʊz/
Trademark. (used with a singular verb)
any of several personal computer operating systems or environments featuring a graphical user interface.


[win-doh] /ˈwɪn doʊ/
an opening in the wall of a building, the side of a vehicle, etc., for the admission of air or light, or both, commonly fitted with a frame in which are set movable sashes containing panes of glass.
such an opening with the frame, sashes, and panes of glass, or any other device, by which it is closed.
the frame, sashes, and panes of glass, or the like, intended to fit such an opening:
Finally the builders put in the windows.
a windowpane.
anything likened to a window in appearance or function, as a transparent section in an envelope, displaying the address.
a period of time regarded as highly favorable for initiating or completing something:
Investors have a window of perhaps six months before interest rates rise.
Military. chaff1 (def 5).
Geology. fenster.
Pharmacology. the drug dosage range that results in a therapeutic effect, a lower dose being insufficient and a higher dose being toxic.
  1. launch window.
  2. a specific area at the outer limits of the earth's atmosphere through which a spacecraft must reenter to arrive safely at its planned destination.
Computers. a section of a display screen that can be created for viewing information from another part of a file or from another file:
The split screen feature enables a user to create two or more windows.
verb (used with object)
to furnish with a window or windows.
Obsolete. to display or put in a window.
Origin of window
1175-1225; Middle English windoge, windowe < Old Norse vindauga, equivalent to vindr wind1 + auga eye
Related forms
windowless, adjective
windowy, adjective
unwindowed, adjective
well-windowed, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
Examples from the Web for Windows
Contemporary Examples
Historical Examples
  • Students have made the study of its Windows a lifetime enthusiasm.

    How France Built Her Cathedrals Elizabeth Boyle O'Reilly
  • Framed in an opening of the curtains which covered one of the Windows was the Figure!

    Jack O' Judgment Edgar Wallace
  • There are roses and stocks and geraniums showing from behind the Windows.

    Through Arctic Lapland Cutcliffe Hyne
  • I like your house, ma'am, only I should think you'd want some Windows.

    Little Prudy Sophie May
  • Such awnings will be found as satisfactory for exposed doors as for Windows.

    ABC of Gardening Eben Eugene Rexford
British Dictionary definitions for Windows


a light framework, made of timber, metal, or plastic, that contains glass or glazed opening frames and is placed in a wall or roof to let in light or air or to see through related adjective fenestral
an opening in the wall or roof of a building that is provided to let in light or air or to see through
the display space in and directly behind a shop window: the dress in the window
any opening or structure resembling a window in function or appearance, such as the transparent area of an envelope revealing an address within
an opportunity to see or understand something usually unseen: a window on the workings of Parliament
a period of unbooked time in a diary, schedule, etc
(physics) a region of the spectrum in which a medium transmits electromagnetic radiation See also radio window
(computing) an area of a VDU display that may be manipulated separately from the rest of the display area; typically different files can be displayed simultaneously in different overlapping windows
(modifier) of or relating to a window or windows: a window ledge
(informal) out of the window, dispensed with; disregarded
(transitive) to furnish with or as if with windows
Word Origin
C13: from Old Norse vindauga, from vindrwind1 + augaeye1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for Windows



early 13c., literally "wind eye," from Old Norse vindauga, from vindr "wind" (see wind (n.1)) + auga "eye. (see eye (n.)). Replaced Old English eagþyrl, literally "eye-hole," and eagduru, literally "eye-door."

Originally an unglazed hole in a roof, most Germanic languages adopted a version of Latin fenestra to describe the glass version, and English used fenester as a parallel word till mid-16c. Window dressing is first recorded 1790; figurative sense is from 1898. Window seat is attested from 1778. Window-shopping is recorded from 1922. Window of opportunity (1979) is from earlier figurative use in U.S. space program, e.g. launch window (1965).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Windows in Medicine

window win·dow (wĭn'dō)
A fenestra.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Slang definitions & phrases for Windows

wind down

verb phrase

  1. To come or bring to a gradual halt or conclusion: The campaign has begun to wind down/ Shall we wind down our collection drive? (1952+)
  2. To relax gradually: Let me sit here for a few minutes, to wind down (1958+)

[modeled on the winding down of a clock or other machine]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
Cite This Source
Windows in Technology

operating system
See Microsoft Windows, Windows NT.

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source
Windows in the Bible

properly only an opening in a house for the admission of light and air, covered with lattice-work, which might be opened or closed (2 Kings 1:2; Acts 20:9). The spies in Jericho and Paul at Damascus were let down from the windows of houses abutting on the town wall (Josh. 2:15; 2 Cor. 11:33). The clouds are metaphorically called the "windows of heaven" (Gen. 7:11; Mal. 3:10). The word thus rendered in Isa. 54:12 ought rather to be rendered "battlements" (LXX., "bulwarks;" R.V., "pinnacles"), or as Gesenius renders it, "notched battlements, i.e., suns or rays of the sun"= having a radiated appearance like the sun.

Easton's 1897 Bible Dictionary
Cite This Source
Idioms and Phrases with Windows


The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for Windows

Most English speakers likely know this word

Word Value for Windows

Scrabble Words With Friends

Nearby words for windows