Meaning ofaperturein English

Noun

1. a small hole or opening; limited access
   The camera's aperture controls the amount of light entering the lens.
2. a small opening or gap; narrow passage
   The aperture of the telescope allows us to observe distant stars.
3. diameter of a restrictive hole (in optics)
   A small aperture in the wall provided limited access to the crawl space.
4. a hole restricting light in optical systems
   The narrow aperture between the rocks made it difficult to pass through.