Meaning of “cut down (sth)” - Learner’s Dictionary

cut down (sth)

phrasal verb with cut us uk /kʌt/ verb present participle cutting, past tense and past participle cut

B2 to eat or drink less of something, or to reduce the amount or number of something:

My doctor says I should cut down on cigarettes.

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