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Noun: aperture  a-pu(r)-chu(r)
  1. A man-made opening; usually small
    "He peeked through the aperture in the wall to see what was happening on the other side"
     
  2. A natural opening in something
    "Light streamed through the small aperture in the cave wall"
     
  3. A variable-sized hole that controls the amount of light admitted to a camera
    "The photographer adjusted the aperture to allow more light in for the low-light shot"

Derived forms: apertures

Type of: hole, opening, regulator

Part of: camera, eye, oculus [rare], optic, photographic camera, scope [informal], telescope

Encyclopedia: Aperture, magazine