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Definitions from WordNet

Noun periscope has 1 sense
  1. periscope - an optical instrument that provides a view of an otherwise obstructed field
    --1 is a kind of
    optical instrument
    --1 is a part of submarine, pigboat, sub, U-boat

Definitions from the Web



  1. A periscope is an optical instrument used to see objects that are out of sight. It consists of a long tube with mirrors or prisms that reflect and redirect the light, allowing the viewer to see over obstacles or around corners.
  2. A periscope is also a device on a submarine or a naval ship that is used for viewing above the water's surface. It enables stealthy surveillance and navigation.

Sample Sentences:

  • He used a periscope to catch a glimpse of the rare bird hiding in the thick bushes.
  • The captain relied on the periscope to scan the horizon for enemy vessels.


  1. To periscope means to use or operate a periscope for viewing something that is hidden or obstructed.

Sample Sentences:

  • The explorers had to periscope above the dense trees to locate their campsite.
  • She periscoped to get a better view of the concert stage.

Popular Usage

In popular usage, a periscope refers to the live video streaming app and platform called Periscope.

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