| 1. | a student appointed to assist in the conduct of a class or school, as to help take attendance or keep order. |
| 2. | a person appointed to supervise students, applicants, etc., taking an examination, chiefly to prevent cheating; proctor. |
| 3. | a person who admonishes, esp. with reference to conduct. |
| 4. | something that serves to remind or give warning. |
| 5. | a device or arrangement for observing, detecting, or recording the operation of a machine or system, esp. an automatic control system. |
| 6. | an instrument for detecting dangerous gases, radiation, etc. |
| 7. | Radio and Television.
|
| 8. | Computers.
|
| 9. | Nautical.
|
| 10. | a raised construction straddling the ridge of a roof and having windows or louvers for lighting or ventilating a building, as a factory or warehouse. |
| 11. | an articulated mounting for a nozzle, usually mechanically operated, which permits a stream of water to be played in any desired direction, as in firefighting or hydraulic mining. |
| 12. | Also called giant. (in hydraulic mining) a nozzle for dislodging and breaking up placer deposits with a jet of water. |
| 13. | any of various large lizards of the family Varanidae, of Africa, southern Asia, the East Indies, and Australia, fabled to give warning of the presence of crocodiles: several species are endangered. |
| 14. | Radio and Television.
|
| 15. | to observe, record, or detect (an operation or condition) with instruments that have no effect upon the operation or condition. |
| 16. | to oversee, supervise, or regulate: to monitor the administering of a test. |
| 17. | to watch closely for purposes of control, surveillance, etc.; keep track of; check continually: to monitor one's eating habits. |
| 18. | to serve as a monitor, detector, supervisor, etc. |

monitor mon·i·tor (mŏn'ĭ-tər)
n.
A usually electronic device used to record, regulate, or control a process or system. v. mon·i·tored, mon·i·tor·ing, mon·i·tors