Dictionary

aperture

noun ap·er·ture \ˈap-ə(r)-ˌchr, -chər, -ˌtyr, -ˌtr\

: 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)

Full Definition of APERTURE

1
:  an opening or open space :  hole
2
a :  the opening in a photographic lens that admits the light
b :  the diameter of the stop in an optical system that determines the diameter of the bundle of rays traversing the instrument
c :  the diameter of the objective lens or mirror of a telescope

Examples of APERTURE

  1. We entered the cave through a narrow aperture.
  2. The photograph was taken using a fast shutter speed and a large aperture.

Origin of APERTURE

Middle English, from Latin apertura, from apertus, past participle of aperire to open
First Known Use: 15th century

Other Pictures (on film) Terms

daguerreotype, emulsion, fill, sepia, still, stop

aperture

noun ap·er·ture \ˈap-ə(r)-ˌch(ə)r, -chər, -ˌt(y)(ə)r\   (Medical Dictionary)

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
May 30, 2015
metadata Hear it
data about other data
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears