revision
🇺🇸
/rɪˈvɪʒn/
🇬🇧
/rɪˈvɪʒn/
a change made to improve something
She did a quick revision of her essay to fix the spelling mistakes.
the act of changing or reviewing something to make it better
The company's rules need revision to be more fair.
studying material again to prepare for a test
Good revision helps you remember what you learned for the exam.