periscope

play
noun peri·scope \ˈper-ə-ˌskōp\

Definition of periscope

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

Recent Examples of periscope from the Web

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.

Illustration of periscope

Origin and Etymology of periscope

International Scientific Vocabulary


First Known Use: 1879

Other Nautical Terms


PERISCOPE Defined for English Language Learners

periscope

play
noun

Definition of periscope for English Language Learners

  • : 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


PERISCOPE Defined for Kids

periscope

play
noun peri·scope \ˈper-ə-ˌskōp\

Definition of periscope for Students

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



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