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stop down

verb
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stopped down; stopping down; stops down

Definition of stop down

transitive verb

: to reduce the effective aperture of (a lens) by means of a diaphragm

First Known Use of stop down

circa 1891, in the meaning defined above

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Time Traveler for stop down

Time Traveler

The first known use of stop down was circa 1891

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Dictionary Entries Near stop down

stop (dead) in one's tracks

stop down

stop drill

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Cite this Entry

“Stop down.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stop%20down. Accessed 26 Oct. 2021.

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