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.

And oft, mild friend, to me thou art A monitor, though still; Thou speak'st a lesson to my heart, Beyond the preacher's skill.

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

To watch over; to guard.

Monitoring refers to keeping a watch over patients to ensure that they are practising what they have learnt about disability prevention correctly.

During July 1989-February 1990 ambient SO₂, was monitored using a mobile station in the residential-commercial neighborhood of Copacabana.

Any of several publications e.g. the "Christian Science Monitor".

A text of works or instruction which are not secret and may be written e.g. "Indiana Monitor and Freemasons' Guide".

The USS Monitor, the first ironclad warship of its type.