monitor

[ˈmɒnɪtə]
n
a person or piece of equipment that warns, checks, controls, or keeps a continuous record of something
a senior pupil with various supervisory duties.a pupil assisting a teacher in classroom organization, etc
a television screen used to display certain kinds of information in a television studio, airport, etc
the unit in a desk computer that contains the screen
a loudspeaker used in a recording studio control room to determine quality or balance.a loudspeaker used on stage to enable musicians to hear themselves
a device for controlling the direction of a water jet in fire fighting
any large predatory lizard of the genus Varanus and family Varanidae, inhabiting warm regions of Africa, Asia, and AustraliaSee Komodo dragon
Also called: giant a nozzle for directing a high-pressure jet of water at the material to be excavated
(formerly) a small heavily armoured shallow-draught warship used for coastal assault
vb
to act as a monitor of
to observe or record (the activity or performance) of (an engine or other device)
to check (the technical quality of) (a radio or television broadcast)