Definition of aperture
1 : an opening or open space : hole entered the cave through a narrow aperture
2a : the opening in a photographic lens that admits the lightb : the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrumentc : the diameter of the objective lens or mirror of a telescope
Examples of aperture in a Sentence
We entered the cave through a narrow aperture.
The photograph was taken using a fast shutter speed and a large aperture.
Recent Examples of aperture from the Web
In time, people become dependent on the emotional high of anger and unable to see the world through any other aperture.
A better way, Farr says, is to use interferometric synthetic aperture radar, or InSAR.
Launched in July 1998, this contraption is made mostly of brass, and recessed into each of the 60 golf-ball-size apertures dotting the sphere is a device about the size and shape of an old camera flashcube.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aperture'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of aperture
Middle English, from Latin apertura, from apertus, past participle of aperire to open
First Known Use: 15th century
APERTURE Defined for English Language Learners
Definition of aperture for English Language Learners
: a hole or small opening in something
: an opening that controls the amount of light that passes through a lens (such as a camera lens)
APERTURE Defined for Kids
Medical Definition of aperture
1: an opening or open space
2: the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument
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