1N-COUNT [usually plural](尤指对作业的)批改,修改Corrections are marks or comments made on a piece of work, especially school work, which indicate where there are mistakes and what are the right answers. (尤指对作业的)批改,修改
2N-UNCOUNT [oft NOUN n](对罪犯的)惩罚,处罚Correction is the punishment of criminals. (对罪犯的)惩罚,处罚 [mainly US]
...jails and other parts of the correction system.