monitor

/ˈmɒnɪtər/ noun [C]

Definition

› IT a computer screen: Adjust your monitor if the colour does not appear quite right.

› LAW a person or organization whose job is to make certain that something is done properly or honestly: The process will be watched closely during the next three years by an independent monitor.

› IT a machine that regularly watches or tests and records something: The acoustical monitor will collect real-time data and filter out non-whale noises. a surveillance monitor a blood pressure/heart monitor

(Definition of monitor noun from the Cambridge Business English Dictionary © Cambridge University Press)