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monitor

noun [C] (SCREEN)
 
 
/ˈmɒn.ɪ.tər/ US  /ˈmɑː.nɪ.t̬ɚ/

Definition

B2 a device with a screen on which words or pictures can be shown: a computer monitor a TV monitor Doctors watched the old man's heartbeat on a monitor.Computer hardwareMachine parts
(Definition of monitor noun (SCREEN) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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