Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “monitor”

See all translations

monitor

noun [C] uk   /ˈmɒn.ɪ.tər/ us    /ˈmɑː.nɪ.t̬ɚ/

monitor noun [C] (PERSON WHO WATCHES)

B2 a person who has the job of watching or noticing particular things: United Nations monitors were not allowed to enter the area.
More examples

monitor noun [C] (TESTING MACHINE)

a machine that regularly tests something: a radiation monitor

monitor noun [C] (SCREEN)

B2 a computer screen or a device with a screen on which words or pictures can be shown: a computer monitor a TV monitor Doctors watched the old man's heartbeat on a monitor.

monitor noun [C] (AT SCHOOL)

a child in school who has special jobs to do: the library monitor

monitor

verb [T] uk   /ˈmɒn.ɪ.tər/ us    /ˈmɑː.nɪ.t̬ɚ/
C1 to watch and check a situation carefully for a period of time in order to discover something about it: The new findings suggest that women ought to monitor their cholesterol levels. The CIA were monitoring (= secretly listening to) his phone calls.
More examples
(Definition of monitor from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of monitor?
Add Cambridge dictionaries to your browser to your website

More meanings of “monitor”

Definitions of “monitor” in other dictionaries

Word of the Day

be as cold as ice

to be extremely cold

Word of the Day

Let’s celebrate! (words and phrases for parties)

by Kate Woodford,
December 17, 2014
​​​ With Christmas and New Year almost upon us, we thought it a good time to look at the language of parties and celebrations. First, let’s start with the word ‘party’ itself. To have or throw a party or, less commonly, to give a party is to arrange a party: We’re having a

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More