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Definition of aperture

aperture

/ˈæp.ər.tʃər/
ap · er · ture
Plural:apertures
•
Adjective:apertural
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aperture Lexical Profile

aperture Game Scores & Validity

• noun

1

An adjustable opening in a camera lens or optical instrument that controls the amount of light reaching the sensor or film, or the diameter of such an opening.

Example

"The photographer widened the aperture to blur the background and capture a sharp portrait in the dim evening light."

2

A small opening, hole, gap, or slit in or through a solid structure.

Example

"A narrow shaft of sunlight streamed through the small aperture high in the stone wall."

Synonyms
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Antonyms
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• Nearby Words

apeman
apennines
aperitif
aperture
apeshit
apex
aphelandra

Word Origin & Etymology

Borrowed in the 15th century from Latin apertura ('an opening'), derived from the past participle stem of aperire ('to open, uncover').

Cite this Entry

Wordmom. (2026). Definition of Aperture. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/aperture
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