Meaning of “caution” - Learner’s Dictionary

caution

noun uk us /ˈkɔːʃən/
CARE [ U ]

great care and attention not to take risks or get into danger:

Travellers have been advised to exercise great caution when passing through the region.
I would treat anything he says with extreme caution (= not be too quick to believe it).
WARNING [ C ] UK

a warning by a police officer or other person in authority telling you that you will be punished if you do something bad again

→ See also err on the side of caution , throw caution to the wind

(Definition of “caution noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)