1. [n]  reducing prices back to some earlier level
2. [n]  the act of forcing the enemy to withdraw

Rollback
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Reverting data in a database to an earlier state, usually in response to an error or aborted operation.

In a transaction based database system, transactions are considered atomic. If an error occurs while performing a transaction, the database is automatically rolled back to the state at the previous commit.

Rollback may also be performed by an explicit rollback transaction.