peri·​scope | \ ˈper-ə-ˌskōp How to pronounce periscope (audio) \

Definition of periscope

: a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view

Illustration of periscope

Illustration of periscope

Examples of periscope in a Sentence

Recent Examples on the Web Surface ships or a sub operating at periscope depth can relay on global positioning satellites to give sailors a very accurate location, said Shugart, now an adjunct senior fellow at the Center for a New American Security. Brad Lendon, CNN, 4 Nov. 2021 The telephoto is actually a kind of sideways periscope camera. Christian De Looper, BGR, 25 Oct. 2021 The periscope cam comes out of the top of Astro and allows Astro to extend its camera view to higher places. Patrick Moorhead, Forbes, 2 Oct. 2021 But sometimes the company will roll out something truly bonkers, like a flying home security drone or a Roomba-like robot with an extending periscope camera that wheels around your house. Wired Staff, Wired, 1 Oct. 2021 Topping things off is an 8-megapixel periscope camera that supports 5x optical zoom and 50x digital zoom. Chris Smith, BGR, 10 Aug. 2021 Although serving such a vital part in the operation of a submarine the periscope is exceedingly simple in construction. Popular Mechanics Editors, Popular Mechanics, 8 Apr. 2021 That’s the telephoto lens equipping devices with periscope cameras. Chris Smith, BGR, 30 June 2021 There is also an intake periscope mounted to the cockpit roof together with an extended in-line wing element that runs over the engine cover. Mike Duff, Car and Driver, 13 Aug. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'periscope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of periscope

1879, in the meaning defined above

History and Etymology for periscope

International Scientific Vocabulary

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Time Traveler for periscope

Time Traveler

The first known use of periscope was in 1879

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Cite this Entry

“Periscope.” Dictionary, Merriam-Webster, Accessed 18 Jan. 2022.

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More Definitions for periscope



English Language Learners Definition of periscope

: a long tube that contains lenses and mirrors and that is used to look over or around something and especially by a person in a submarine to see above the surface of the water


peri·​scope | \ ˈper-ə-ˌskōp How to pronounce periscope (audio) \

Kids Definition of periscope

: an instrument containing lenses and mirrors by which a person (as on a submarine) can get a view that would otherwise be blocked

More from Merriam-Webster on periscope

Nglish: Translation of periscope for Spanish Speakers Encyclopedia article about periscope


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