Definition of monitor verb from the Oxford Advanced Learner's Dictionary

        

    monitor

     verb
    verb
    BrE BrE//ˈmɒnɪtə(r)//
     
    ; NAmE NAmE//ˈmɑːnɪtər//
     
    Verb Forms present simple I / you / we / they monitor
    BrE BrE//ˈmɒnɪtə(r)//
     
    ; NAmE NAmE//ˈmɑːnɪtər//
     
    he / she / it monitors
    BrE BrE//ˈmɒnɪtəz//
     
    ; NAmE NAmE//ˈmɑːnɪtərz//
     
    past simple monitored
    BrE BrE//ˈmɒnɪtəd//
     
    ; NAmE NAmE//ˈmɑːnɪtərd//
     
    past participle monitored
    BrE BrE//ˈmɒnɪtəd//
     
    ; NAmE NAmE//ˈmɑːnɪtərd//
     
    -ing form monitoring
    BrE BrE//ˈmɒnɪtərɪŋ//
     
    ; NAmE NAmE//ˈmɑːnɪtərɪŋ//
     
     
    jump to other results
  1. 1  monitor something | monitor what, how, etc… to watch and check something over a period of time in order to see how it develops, so that you can make any necessary changes synonym track Each student's progress is closely monitored.
  2. 2monitor something to listen to telephone calls, foreign radio broadcasts, etc. in order to find out information that might be useful
  3. Word Origin early 16th cent. (in sense (3)): from Latin, from monit- ‘warned’, from the verb monere. Sense (2) dates from the 1930s.Extra examples Television advertising is strictly monitored. The authorities will continue to monitor the situation. The workers are constantly monitored for exposure to radiation. We will now be able to monitor its progress more closely. During the war his job was to monitor enemy radio broadcasts. Each student’s progress is closely monitored over the term. Foreign observers monitored voting at polling stations around the country. The animals’ temperature and heartbeat are regularly monitored. The company routinely monitors all its employees’ emails. Uniformed and undercover police officers monitored the demonstration closely. We need to monitor how the situation develops. We were warned by a friend in the government that our phone calls were being monitored.
See the Oxford Advanced American Dictionary entry: monitor