The difference between Monitor and Oversee

When used as verbs, monitor means to watch over, whereas oversee means to survey, look at something in a wide angle.

Monitor is also noun with the meaning: someone who watches over something.

check bellow for the other definitions of Monitor and Oversee

Monitor as a noun:

Someone who watches over something; a person in charge of something or someone.

Examples:

"The camp monitors look after the children during the night, when the teachers are asleep."
Monitor as a noun:

A device that detects and informs on the presence, quantity, etc., of something.
Monitor as a noun (computing):

A device similar to a television set used as to give a graphical display of the output from a computer.

Examples:

"The information flashed up on the monitor."
Monitor as a noun:

A studio monitor or loudspeaker.
Monitor as a noun (computing):

A program for viewing and editing.

Examples:

"a machine code monitor"
Monitor as a noun (British, archaic):

A student leader in a class.
Monitor as a noun (nautical):

One of a class of relatively small armored warships designed for shore bombardment or riverine warfare rather than combat with other ships.
Monitor as a noun (archaic):

An ironclad.
Monitor as a noun:

A monitor lizard.
Monitor as a noun (obsolete):

One who admonishes; one who warns of faults, informs of duty, or gives advice and instruction by way of reproof or caution.
Monitor as a noun (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.
Monitor as a noun:

A monitor nozzle.

Oversee as a verb (literally):

To survey, look at something in a wide angle.
Oversee as a verb (figuratively):

To supervise, guide, review or direct the actions of a person or group.

Examples:

"It is congress's duty to oversee the spending of federal funds."
Oversee as a verb:

To inspect, examine

Examples:

"Gamekeepers oversee a hunting ground to see to the wildlife's welfare and look for poachers."
Oversee as a verb (obsolete):

To fail to see; to overlook, ignore.
Oversee as a verb:

To observe secretly or unintentionally.