Definition of


  1. (noun, animal) any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
  2. (noun, artifact) a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble
  3. (noun, artifact) electronic equipment that is used to check the quality or content of electronic transmissions
  4. (noun, artifact) display produced by a device that takes signals and displays them on a television screen or a computer monitor
  5. (noun, artifact) an ironclad vessel built by Federal forces to do battle with the Merrimac
  6. (noun, person) someone who gives a warning so that a mistake can be avoided
  7. (noun, person) someone who supervises (an examination)
  8. (verb, perception) keep tabs on; keep an eye on; keep under surveillance
    the police monitor the suspect's moves
  9. (verb, perception) check, track, or observe by means of a receiver

via WordNet, Princeton University

Origin of the word Monitor

  1. 1540s, "senior pupil at a school charged with keeping order, etc.," from L. monitor "one who reminds, admonishes, or checks," from monere "to admonish, warn, advise," related to memini "I remember, I am mindful of," and to mens "mind," from PIE base *men- "to think" (see mind (n.)). The lizard so called because it is supposed to give warning o… more

via Online Etymology Dictionary, ©2001 Douglas Harper

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