Definition of rollback
chiefly North American a reduction or decrease:a 5 percent rollback of personal income taxes
a reversion to a previous state or situation:a rollback to conditions not seen since the open shop days of the 1930s 2 Computing the process of restoring a database or program to a previously defined state, typically to recover from an error.
verb [with object] Computing
restore (a database) to a previously defined state.