(1) The process of restoring data that was changed by an application program or user.
(2) See backout.
(3) In CICS, the cancellation by an application program of the changes it has made to all recoverable resources during the current logical unit of work.
(4) The execution of a scenario's compensation steps by InterChange Server to undo the effects of a partially completed scenario.
(5) An operation in a transaction that reverses all the changes made during the unit of work. After the operation is complete, the unit of work is finished.
(6) The process of restoring data that was changed by SQL statements to the state at its last commit point. All locks are freed.