Meaning of “precaution” - Learner’s Dictionary

precaution

noun [ C ] uk us /prɪˈkɔːʃən/

something that you do to prevent bad things happening in the future:

Driving alone at night can be dangerous, so always take precautions.
They called the doctor as a precaution.
[ + of + doing sth ] He took the precaution of locking the door.
precautionary adjective
a precautionary measure/step

something that you do in order to prevent something bad from happening

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