Window vs. Lunette — What's the Difference?

A window is an opening in a wall, door, roof, or vehicle that allows the passage of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame in the opening; the sash and frame are also referred to as a window.

A lunette (French lunette, "little moon") is a half-moon shaped architectural space, variously filled with sculpture, painted, glazed, filled with recessed masonry, or void. A lunette is formed when a horizontal cornice transects a round-headed arch at the level of the imposts, where the arch springs.

An opening constructed in a wall, door, or roof that functions to admit light or air to an enclosure and is often framed and spanned with glass mounted to permit opening and closing.

A small, circular or crescent-shaped opening in a vaulted roof.

A framework enclosing a pane of glass for such an opening; a sash.

A crescent-shaped or semicircular space, usually over a door or window, that may contain another window, a sculpture, or a mural.

A pane of glass or similar material enclosed in such a framework

A fortification that has two projecting faces and two parallel flanks.

An opening or transparent part that resembles a window in function or appearance

A broad, low-lying, typically crescent-shaped mound of sandy or loamy matter that is formed by the wind, especially along the windward side of a lake basin.

The transparent panel on a window envelope.

(architectural element) A small opening in a vaulted roof of a circular or crescent shape.

The area or space immediately behind a window, especially at the front of a shop

(architectural element) A crescent-shaped recess or void in the space above a window or door. a lunette in the Thomas Jefferson building of the US Library of Congress

A means of access or observation

(obsolete) An image or other representation of a crescent moon.

An interval of time during which an activity can or must take place

(fortifications) A field work consisting of two projecting faces forming a wedge each of which extends from one of two parallel flanks. two kinds of lunette fortification

Strips of foil dropped from an aircraft to confuse enemy radar; chaff.

(Christianity) A luna: a crescent-shaped receptacle, often glass, for holding the (consecrated) host (the bread of communion) upright when exposed in the monstrance.

A range of electromagnetic frequencies that pass unobstructed through a planetary atmosphere.

A type of flattened glass used in watch-making.

(Computers) A rectangular area on a screen in which a document, database, or application can be viewed independently of the other such areas.

The circular hole in the guillotine in which the victim's neck is placed.

A launch window.

(geology) A type of crescent-shaped dune blown up along a lake basin, especially in dry areas of Australia.

An area at the outer limits of the earth's atmosphere through which a spacecraft must pass in order to return safely.

(farriery) A half horseshoe, lacking the sponge.

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.

A piece of felt to cover the eye of a vicious horse.

An opening, usually covered by glass, in a shop which allows people to view the shop and its products from outside; a shop window.

An iron shoe at the end of the stock of a gun carriage.

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

(in the plural) See lunettes.

A period of time when something is available or possible; a limited opportunity.

A fieldwork consisting of two faces, forming a salient angle, and two parallel flanks. See Bastion.

Something that allows one to see through or into something

A half horseshoe, which lacks the sponge.

A restricted range.

A kind of watch crystal which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles.

(graphical user interface) A rectangular area on a computer terminal or screen containing some kind of user interface, displaying the output of and allowing input for one of a number of simultaneously running computer processes.

A piece of felt to cover the eye of a vicious horse.

A figure formed of lines crossing each other.

Any surface of semicircular or segmental form; especially, the piece of wall between the curves of a vault and its springing line.

(medicine) The time between first infection and detectability.

An iron shoe at the end of the stock of a gun carriage.

Synonym of chaff

Temporary fortification like a detached bastion

(signal processing) A function multiplied with a signal to reduce spectral leakage when performing a Fourier transform.

Oval or circular opening; to allow light into a dome or vault

(transitive) To furnish with windows.

(transitive) To place at or in a window.

To apply a window function to (a signal).

An opening in the wall of a building for the admission of light and air, usually closed by casements or sashes containing some transparent material, as glass, and capable of being opened and shut at pleasure.

The shutter, casement, sash with its fittings, or other framework, which closes a window opening.

A figure formed of lines crossing each other.

A period of time in which some activity may be uniquely possible, more easily accomplished, or more likely to succeed; as, a launch window for a mission to Mars.

A region on a computer display screen which represents a separate computational process, controlled more or less independently from the remaining part of the screen, and having widely varying functions, from simply displaying information to comprising a separate conceptual screen in which output can be visualized, input can be controlled, program dialogs may be accomplished, and a program may be controlled independently of any other processes occurring in the computer. The window may have a fixed location and size, or (as in modern Graphical User Interfaces) may have its size and location on the screen under the control of the operator.

To furnish with windows.

To place at or in a window.

A framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air

A transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened

A transparent panel (as of an envelope) inserted in an otherwise opaque material

An opening that resembles a window in appearance or function;

The time period that is considered best for starting or finishing something;

A pane in a window;

An opening in the wall of a building (usually to admit light and air);

(computer science) a rectangular part of a computer screen that contains a display different from the rest of the screen