Meaning of “prohibit” - Learner’s Dictionary

prohibit

verb [ T ] us uk /prəʊˈhɪbɪt/ formal

B2 to officially forbid something:

[ often passive ] Smoking is prohibited on most international flights.
[ + from + doing sth ] The new law prohibits people from drinking alcohol in the street.
a prohibited substance
prohibition noun [ U ] us uk /ˌprəʊhɪˈbɪʃən/

the prohibition of drugs

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