Meaning of “revise” - Learner’s Dictionary

revise

verb uk us /rɪˈvaɪz/
CHANGE [ T ]

B2 to change something so that it is more accurate:

a revised edition of the book
STUDY [ I, T ] UK (US review)

B1 to study a subject before you take a test

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