monitor

Someone who watches over something; a person in charge of something or someone.

• The camp monitors look after the children during the night, when the teachers are asleep.

A device that detects and informs on the presence, quantity, etc., of something.

A device similar to a television set used as to give a graphical display of the output from a computer.

• The information flashed up on the monitor.

A studio monitor or loudspeaker.

A program for viewing and editing.

• a machine code monitor

The command line interface of an operating system.dated

A student leader in a class.Hong-KongSingaporearchaic

• But it was not so—at least, not always—for though they fell out among themselves, they united their forces against the common enemy—the monitors!
• He learned that a monitor should assist the teachers in distributing worksheets, maintaining class discipline, helping classmates in need and so on.

A relatively small armored warship with only one or two turrets (but often carrying unusually large guns for a warship of its size), usually designed for shore bombardment or riverine warfare rather than open-ocean combat.

A monitor lizard (Varanus spp. and extinct relatives in family Varanidae).

A tool holder, as for a lathe, shaped like a low turret, and capable of being revolved on a vertical pivot so as to bring several tools successively into position.

To watch over; to guard.transitive

• 2002, Mark Baker, Garry Smith, GridRM: A Resource Monitoring Architecture for the Grid, in Manish Parashar (editor), Grid Computing - GRID 2002: Third International Workshop, Springer, LNCS 2536, page 268, A wide-area distributed system suc