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
The RQ-4 Global Hawk's first flight was back in February of 1998, and performs a high-altitude surveillance roughly analogous to the U-2 using a synthetic aperture radar to survey as much as 40,000 square miles per day.
For photographs, use a lowlight wide-angle lens set at the lowest aperture - 1.8 or lower.
The camera actually has a lower-resolution lens (12MP compared to 16MP) but Motorola has upped the pixel size, autofocus speed, and aperture to compensate.
In time, people become dependent on the emotional high of anger and unable to see the world through any other aperture.
But the glossy box gleams in its careful lighting, and in the middle the aperture is a perfect circle, an eye unto the world.
The key detail is the pair of arced countdown apertures at 12 o’clock.
Here, Mr. Beavers considers the nature of cinema using light and shadow, various mattes and apertures — including a window spilling sun on a desk — a meditation that at times has the quality of a holy confession.
A better way, Farr says, is to use interferometric synthetic aperture radar, or InSAR.
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 centurySee Words from the same year
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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