monitor monitor /ˈmɑːnətɝ/

noun

1. Any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles  ( monitor , monitor lizard , varan )
   any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
   
   
2. A piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble  ( monitor )
   a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble
    The fetal monitor displayed the baby's heartbeat during childbirth
   The fetal monitor displayed the baby's heartbeat during childbirth
   
3. Electronic equipment that is used to check the quality or content of electronic transmissions  ( monitor )
   electronic equipment that is used to check the quality or content of electronic transmissions
   
4. Display produced by a device that takes signals and displays them on a television screen or a computer monitor  ( monitor , monitoring device )
   display produced by a device that takes signals and displays them on a television screen or a computer monitor
    My monitor is too small, I need to upgrade it
   My monitor is too small, I need to upgrade it
   
   
5. Someone who gives a warning so that a mistake can be avoided  ( admonisher , monitor , reminder )
   someone who gives a warning so that a mistake can be avoided
   
6. Someone who supervises (an examination)  ( monitor , proctor [ N. American] )
   someone who supervises (an examination)
   

verb

1. () Keep tabs on; keep an eye on; keep under surveillance  ( supervise , monitor )
   keep tabs on; keep an eye on; keep under surveillance
    We are monitoring the air quality
   we are monitoring the air quality
    The police monitor the suspect's moves
   the police monitor the suspect's moves
   
2. Check, track, or observe by means of a receiver  ( monitor )
   check, track, or observe by means of a receiver
   

 Monitor

noun

1. An ironclad vessel built by Federal forces to do battle with the Merrimac  ( Monitor )
   an ironclad vessel built by Federal forces to do battle with the Merrimac
    The Monitor, an ironclad vessel, was built by Federal forces to do battle with the Merrimac during the Civil War.
   The Monitor, an ironclad vessel, was built by Federal forces to do battle with the Merrimac during the Civil War.