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Word: stop up (lookup usage) (lookup stats)


Meaning:

Verb:

  • photography To increase the aperture of a photographic lens, moving from an f/stop represented by a higher number to an f/stop represented by a lower number and causing more light to pass into the camera.
  • To fill a hole or cavity, or block an opening or passage, as with a plug.

Source: Wiktionary | Src Info »