monitor >> ˈmɒnɪtə
Definition: [noun] a device used for observing, checking, or keeping a continuous record of something.
Example: a heart monitor
Definition: [noun] a television receiver used in a studio to select or verify the picture being broadcast from a particular camera.
Example: the playback can be displayed on an external television screen or monitor
Definition: [noun] a school pupil with disciplinary or other special duties.
Example: he was a school monitor and a choir boy
Definition: [noun] a large tropical Old World lizard with a long neck, narrow head, forked tongue, strong claws, and a short body. Monitors were formerly believed to give warning of crocodiles.
Definition: [noun] a shallow-draught warship mounting one or two heavy guns for bombardment.
Definition: [verb] observe and check the progress or quality of (something) over a period of time; keep under systematic review.
Example: equipment was installed to monitor air quality