Definition of rollbacks:
(n) :
A return to a prior state by undoing some operation, especially of policy or price changes.
(n) :
(databases) An operation which returns a database, or group of records in a database, to a previous state (normally to the previous commit point).
(v) :
(transitive, computing, databases) To return to the previous state.
(n) :
A withdrawal of military forces.
(n) :
The situation where a rollercoaster fails to reach the top of a hill and instead rolls backward.
(n) :
(aviation) An uncommanded reduction in the thrust of a jet engine.