aperture

ap·er·ture

Use aperture in a sentence

The aperture of a lens.

noun

The definition of an aperture is a crevice, hole, or separation.

An example of an aperture is the opening in a camera lense.

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"aperture." YourDictionary, n.d. Web. 20 July 2019. <https://www.yourdictionary.com/Aperture>.

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aperture. (n.d.). Retrieved July 20th, 2019, from https://www.yourdictionary.com/Aperture

aperture

an opening; hole; gap
the opening, or the diameter of the opening, in a camera, telescope, etc. through which light passes into the lens

Origin of aperture

Classical Latin apertura from apertus, past participle of aperire, to open from Indo-European an unverified form ap-wer-, to uncover from base an unverified form ap(o)-, away + an unverified form wer-, to close, cover from source warn

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"aperture." YourDictionary, n.d. Web. 20 July 2019. <https://www.yourdictionary.com/Aperture>.

APA Style

aperture. (n.d.). Retrieved July 20th, 2019, from https://www.yourdictionary.com/Aperture

aperture

noun

An opening, such as a hole, gap, or slit.
a. A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
b. The diameter of such an opening, often expressed as an f-number.
c. The diameter of the objective of a telescope.

Origin of aperture

Middle English from Latin apertūra from apertus past participle of aperīre to open ; see wer-⁴ in Indo-European roots.

Related Forms:

ap′er·tur′al
adjective

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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MLA Style

"aperture." YourDictionary, n.d. Web. 20 July 2019. <https://www.yourdictionary.com/Aperture>.

APA Style

aperture. (n.d.). Retrieved July 20th, 2019, from https://www.yourdictionary.com/Aperture

Noun

(plural apertures)

An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
An aperture between the mountains. --Gilpin.
The back aperture of the nostrils. --Owen.
(optics) Something which restricts the diameter of the light path through one plane in an optical system.
(astronomy, photography) The diameter of the aperture (in the sense above) which restricts the width of the light path through the whole system. For a telescope, this is the diameter of the objective lens. e.g. a telescope may have a 100 cm aperture.
(spaceflight, communication) The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.
(mathematics, rare, of a right circular cone) The maximum angle between the two generatrices.
If the generatrix makes an angle θ to the axis, then the aperture is 2θ.

Usage notes

The aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100° aperture.

Origin

From Latin apertūra (“opening”), from apertus, past participle of aperīre (“to open, uncover”), opposed to operīre (“to close, cover”). See aperient.

English Wiktionary. Available under CC-BY-SA license.

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MLA Style

"aperture." YourDictionary, n.d. Web. 20 July 2019. <https://www.yourdictionary.com/Aperture>.

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aperture. (n.d.). Retrieved July 20th, 2019, from https://www.yourdictionary.com/Aperture

aperture - Computer Definition

(1) An orifice. It often refers to an opening in which light is allowed to pass in optical systems such as cameras and lasers. See f-stop and numerical aperture.

(2) (Aperture) A photo editing and management application for the Mac from Apple. Introduced in 2005 and used by professional photographers, Aperture provides sophisticated touch-up tools and works with the iPhoto library. See iLife.

Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY All other reproduction is strictly prohibited without permission from the publisher. © 1981-2017 The Computer Language Company Inc. All rights reserved.