Simple past tense and past participle of monitor.(verb)
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Use "monitored" in a sentence
"Now, your every action is monitored from the moment you step out of your door."
"What about the phrase "properly monitored", is that Orwellian enough for you?"
"Footage is monitored from a control room and when an offence is seen the person can be told to stop by staff via a loudspeaker or pre-recorded message …. messages asking them to keep their valuables safe, telling them that their behaviour is being monitored and asking them not to drop litter. [emphasis added]"