| monitor | |
| 1. n. Someone who watches over something; a person in charge of something or someone. | |
| The camp monitors look after the children during the night, when the teachers are asleep. | |
| 2. n. A device that detects and informs on the presence, quantity, etc., of something. | |
| 3. n. (computing) A device similar to a television set used as to give a graphical display of the output from a computer. | |
| The information flashed up on the monitor. | |
| 4. n. A studio monitor or loudspeaker. | |
| 5. n. (computing) A program for viewing and editing. | |
| a machine code monitor | |
| 6. n. (UK, archaic) A student leader in a class. | |
| 7. n. (nautical) One of a class of relatively small armored warships designed for shore bombardment or riverine warfare rather than combat with other ships. | |
| 8. n. (archaic) An ironclad. | |
| 9. n. A monitor lizard. | |
| 10. n. (obsolete) One who admonishes; one who warns of faults, informs of duty, or gives advice and instruction by way of reproof or caution. | |
| 11. n. (engineering) A tool holder, as for a lathe, shaped like a low turret, and capable of being revolved on a vertical pivot so as to bring the several tools successively into position. | |
| 12. n. A monitor nozzle. | |
| 13. v. To watch over; to guard. | |
