monitor

[1]	watch , oversee , observe , check (out/up on) , audit , supervise , superintend , scan , examine , study , follow , keep an eye on , survey , keep track of , track , trace , record , (Brit) vet
[2]	supervise

[1]	proctor , watchdog , supervisor , sentinel , guard , guardian , custodian , (Brit) invigilator , prefect , (Rare) prepositor/praepostor , (US) proctor
[2]	(television) screen , admonisher , reminder , cathode-ray tube screen , CRT , display , (Mainly Brit) visual display unit , VDU
[3]	monitoring device
[4]	monitor lizard , varan