Definition, Meaning & Synonyms

periscope

noun
/ˈpɛrɪˌskoʊp/
Definition
A device that allows an observer to see things that are not in their direct line of sight.
Examples
  • He used a periscope to look over the high fence.
  • The submarine’s periscope allowed the crew to survey the surface without being detected.
Meaning
A periscope is often used in submarines or other situations where direct visibility is blocked, enabling view over obstacles.
Synonyms
  • Viewfinder
  • Observer
  • Lookout