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

pup

a baby of particular animals, or a puppy

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More