what is correction, Corrective action and Preventive action

Correction
Corrections are immediate actions taken to correct, contain or eliminate a nonconformity or other undesirable event. Note: A correction can be made in conjunction with a corrective action.

Corrective Action
Action taken to eliminate the cause of the deviation, based on an investigation. Corrective actions should prevent recurrence of the deviation.

Preventive action
Action to eliminate the cause of a potential nonconformity. “Preventive action is taken to prevent occurrence whereas corrective action is taken to prevent recurrence”