S: (n) monitor, monitoring device (display produced by a device that takes signals and displays them on a television screen or a computer monitor)
S: (n) monitor (electronic equipment that is used to check the quality or content of electronic transmissions)
S: (n) monitor (a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble)
S: (n) monitor, monitor lizard, varan (any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles)
Verb
S: (v) monitor, supervise (keep tabs on; keep an eye on; keep under surveillance) "we are monitoring the air quality"; "the police monitor the suspect's moves"
S: (v) watch (look attentively) "watch a basketball game"
S: (v) witness (be a witness to) "She witnessed the accident and had to testify in court"
S: (v) rubberneck (strain to watch; stare curiously) "The cars slowed down and the drivers rubbernecked after the accident"
S: (v) watch, view, see, catch, take in (see or watch) "view a show on television"; "This program will be seen all over the world"; "view an exhibition"; "Catch a show on Broadway"; "see a movie"
S: (v) observe (watch attentively) "Please observe the reaction of these two chemicals"