Definition of Periscope

a viewing instrument, in the shape of a tube comprised of mirrors and lenses, that allows a viewer to obtain a clear field of sight

Examples of Periscope in a sentence

Although the soldier was positioned in a ditch, he was able to use a periscope to observe the enemy camp above ground.  

A periscope uses lenses and mirrors to provide a user with an unbarred view of an area that would normally be impossible to see.  

While in the submarine, the sailor used a periscope to search for movements on the surface of the ocean.  

A periscope rotates and provides the viewer with a 360-degree observation of a geographic region.  

Doctors frequently use an instrument similar to a periscope to examine the inside of the human body.  

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