A monitor assigned by the authorities to someone, such as a foreign visitor (to exercise control over their contacts with the populace) or a journalist or someone who is speaking to journalists (to monitor and control what they say).
One who minds, tends, or watches something such as a child, a machine, or cattle; a keeper.
A personal bodyguard.
A professional nurse who is a licensed graduate of a university or college of nursing who has successfully passed an examination such as NCLEX-RN.