Meaning of “prohibitive” - Learner’s Dictionary

prohibitive

adjective uk us /prəʊˈhɪbətɪv/

If the cost of something is prohibitive, it is too expensive for many people:

The cost of flying first class is prohibitive for most people.
prohibitively adverb

prohibitively expensive

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