Learner's definition of CORRECTION
1 [count] : a change that makes something right, true, accurate, etc.
They ran/published a correction in today's paper. [=there was a statement in the newspaper saying that something printed in an earlier newspaper was not accurate]
The teacher marked corrections on his students' tests.
Please make corrections before handing in your compositions.
2 [noncount] : the act of making something (such as an error or a bad condition) accurate or better : the act of correcting something 3 : the act or process of punishing and changing the behavior of people who have committed crimes
[plural]US — used to refer to government systems and actions that relate to punishing and dealing with criminals — often used before another noun
— correctional/kəˈrɛkʃənl̟/adjective,always used before a noun,chiefly US