Meaning of “devalue” - Learner’s Dictionary

devalue

verb [ T ] uk us /ˌdiːˈvæljuː/ (present participle devaluing, past tense and past participle devalued)
MONEY

to make something less valuable, especially a country's money:

to devalue the pound
IMPORTANCE

to make someone or something seem less important than they really are

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