monitor

Noun

• any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles

• a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble

• electronic equipment that is used to check the quality or content of electronic transmissions

• display produced by a device that takes signals and displays them on a television screen or a computer monitor

• an ironclad vessel built by Federal forces to do battle with the Merrimac

• someone who gives a warning so that a mistake can be avoided

• someone who supervises (an examination)

Verb

• check, track, or observe by means of a receiver

• keep tabs on; keep an eye on; keep under surveillance
  • we are monitoring the air quality
    
  • the police monitor the suspect's moves
    

Related words

• Synonyms: 
  monitor lizard , varan , monitoring device , Monitor , admonisher , reminder , proctor , supervise