monitor is on the Academic Word List.

Pronunciation

change
  • (US) IPA (key): /ˈmɔn.ɪˌtɚ/ or /ˈmɔn.əˌtɚ/
  • (UK) IPA (key): /ˈmɒnɨtə/
  • (file)

Singular
monitor

Plural
monitors

 
A computer keyboard and monitor.
  1. (countable) A monitor is part of a computer or other similar machine, and it looks like a TV.
    The engineers stood around the monitor making suggesting about how the drawing could be improved.
  2. (countable) A monitor is a person or group whose job is to watch for problems, changes, etc.
    During the test, a monitor caught me copying off the guy sitting next to me.
  3. (countable) A monitor is a speaker that helps musicians hear what they are playing or helps people listen to an area that they are interested in.
    We put the baby to sleep, closed the door, and turned on the monitor in the kitchen.

Plain form
monitor

Third-person singular
monitors

Past tense
monitored

Past participle
monitored

Present participle
monitoring

  1. If you monitor something, you watch or listen to it for problems, changes, etc.
    The army was sent in to monitor the police.
    Parents should monitor their children's computer use.