in some schools, a student chosen to help keep order, record attendance, etc.
something that reminds or warns
any of a family (Varanidae) of usually very large, flesh-eating lizards of Africa, S Asia, and Australia: from the notion that they warn of the presence of crocodiles
☆ Historical a heavily armored warship with a low, flat deck and heavy guns fitted in one or more revolving turrets
☆ a mounting for a nozzle that allows a stream of water to be played in any direction, as in fire fighting
a person who monitors a foreign broadcast, etc.
any of various devices for checking or regulating the performance of machines, aircraft, guided missiles, etc.
an instrument for measuring radioactive contamination by means of the ionizing radiation being emitted
Comput. a video screen for displaying data, graphic images, etc.
Radio, TV a receiver or speaker, as in the control room of a broadcasting studio, for checking the quality of the transmission
transitive verb, intransitive verb
to watch or check on (a person or thing) as a monitor
to check on or regulate the performance of (a machine, airplane, etc.)
to test for radioactive contamination with a monitor
to listen in on (a foreign broadcast, telephone conversation, etc.) as for gathering political or military information
Radio, TV to check the quality of (transmission) with or as with a monitor