monitor UK /ˈmɒn.ɪ.tə/US /ˈmɑ.nɪ.tɚ/verb 1noun 14forms 3 verb1 •to keep watching someone or something carefully to make sure that nothing goes wrongMonitoring refers to keeping a watch over patients to ensure that they are practising what they have learnt about disability prevention correctly. — 1993 noun14 •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 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 student leader in a class.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! — 1881 •A device that detects and informs on the presence, quantity, etc., of something. •A monitor lizard (Varanus spp. and extinct relatives in family Varanidae). •A studio monitor or loudspeaker. •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. •An ironclad warship with a low freeboard and a rotating turret. •A modern shallow-draft warship for coastal bombardment. •A program for viewing and editing. •(old-fashioned) The command line interface of an operating system. •A monitor nozzle. •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. •(no longer used) One who admonishes; one who warns of faults, informs of duty, or gives advice and instruction by way of reproof or caution.You need not be a monitor to your gracious master the king. — 1620 formsmonitored · monitoring · monitors