Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “periscope”

periscope

noun [C]  /ˈper·əˌskoʊp/ us  
a vertical tube containing mirrors that can give you a view of what is above you when you look through the bottom of the tube: The periscope of the submarine was visible just above the surface of the water.
(Definition of periscope from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of periscope?
Add Cambridge dictionaries to your browser to your website

Definitions of “periscope” in other dictionaries

Word of the Day

light at the end of the tunnel

signs of improvement in a situation that has been bad for a long time, or signs that a long and difficult piece of work is almost finished

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More