# stop up

> English word · Verb

## Definitions
1. To fill a hole or cavity, or block (an opening or passage), as with a plug.
2. To permanently close or block (a road or path); to legally extinguish a right of way.
3. 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.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/stop-up