Possible meanings to the term "Monitor" as defined by the Merriam-Webster Dictionary

What is monitoring? Consulting Merriam-Webster Dictionary for its meaning and uses:

https://www.merriam-webster.com/dictionary/monitor

monitor

 noun

mon·​i·​tor | \ ˈmä-nə-tər  \

Definition of monitor

 (Entry 1 of 2)

1a: a student appointed to assist a teacher

b: one that warns or instructsmonitors and instructors for troops green in the art of war— New York Times

c: one that monitors or is used in monitoring: such as

(1): an electronic device with a screen used for display (as of television pictures or computer information)

(2): a device for observing a biological condition or functiona heart monitor

2: MONITOR LIZARD

3[ Monitor, first ship of the type ]

a: a heavily armored warship formerly used in coastal operations having a very low freeboard and one or more revolving gun turrets

b: a small modern warship with shallow draft (see DRAFT entry 1 sense 8) for coastal bombardment

4: a raised central portion of a roof having low windows or louvers for providing light and air

monitor

 verb

monitored; monitoring\ ˈmä-​nə-​t(ə-​)riŋ  \

Definition of monitor (Entry 2 of 2)

transitive verb

: to watch, keep track of, or check usually for a special purposeNurses monitored the patient's heart rate.