1. monitoring, observation, observance, watching

usage: the act of observing something (and sometimes keeping a record of it); "the monitoring of enemy communications plays an important role in war times"


1. monitor, supervise, observe

usage: keep tabs on; keep an eye on; keep under surveillance; "we are monitoring the air quality"; "the police monitor the suspect's moves"

2. monitor, observe

usage: check, track, or observe by means of a receiver

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