aperture aperture /ˈæpɝtʃɝ/

noun

1. () A device that controls amount of light admitted  ( aperture )
   a device that controls amount of light admitted
    The photographer adjusted the aperture to let in the perfect amount of light for the shot.
   The photographer adjusted the aperture to let in the perfect amount of light for the shot.
   
   
2. An man-made opening; usually small  ( aperture )
   an man-made opening; usually small
    The photographer adjusted the aperture, the small man-made opening, to let in more light.
   The photographer adjusted the aperture, the small man-made opening, to let in more light.
   
   
3. A natural opening in something  ( aperture )
   a natural opening in something
    Sunlight streamed through the aperture in the ancient temple's roof.
   Sunlight streamed through the aperture in the ancient temple's roof.