monitor

Noun
  1. Someone who supervises (an examination) (synset 110498545)
  2. Someone who gives a warning so that a mistake can be avoided (synset 109791278)
  3. An ironclad vessel built by Federal forces to do battle with the Merrimac (synset 103787963)
  4. Display produced by a device that takes signals and displays them on a television screen or a computer monitor (synset 103787723)
  5. Electronic equipment that is used to check the quality or content of electronic transmissions (synset 103787539)
  6. A piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble (synset 103787320)
  7. Any of various large tropical carnivorous lizards of Africa and Asia and Australia;
    Fabled to warn of crocodiles (synset 101697350)
Verb
  1. Keep tabs on;
    Keep an eye on;
    Keep under surveillance (synset 202167732)
    "we are monitoring the air quality"; "the police monitor the suspect's moves"
  2. Check, track, or observe by means of a receiver (synset 202168057)

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