(1) The process of undoing uncommitted changes that an application process has made. A backout might be necessary in the event of a failure on the part of an application process or as a result of a deadlock situation. See also roll back, backout free interval.
(2) An operation that reverses all changes to resources made during the current unit of work. See also commit, recoverable data set, nonrecoverable data set.
(3) See rollback.
(4) See rollback.
(5) The process of removing all the database updates performed by an application program that has terminated abnormally. See also dynamic backout.