n. 1 watchdog, supervisor, sentinel, guard, guardian, custodian; Brit invigilator, prefect, Rare prepositor or praepostor; US proctor The government has appointed a committee to monitor oil prices 2 (television) screen, cathode-ray tube screen, CRT, display, Chiefly Brit visual display unit, VDU Do you prefer an amber, green, or black-and-white monitor?
v. 3 watch, oversee, observe, check (out or up on), audit, supervise, superintend, scan, examine, study, follow, keep an eye on, survey, keep track of, track, trace, record, Brit vet Before a drug is approved, it must be monitored through thousands of tests