rollback-n; 3 Senses

Sense Number 1: a reduction or decrease in price, cost

Commentary: ROLLBACK[+quantity][+decrease][+price]

The government has ordered a 5 percent rollback on the price of gasoline.
Even with the significant rollbacks on the cost of food, most people still could not afford much.
The legislature did not approve a rollback of the emergency tax increase of last year.

WordNet 3.0 Sense Numbers: 2

Sense Number 2: a reversion to an earlier state or situation

Commentary: ROLLBACK[+event][+reversion][+to_circumstance][+previous]

They are adamantly opposed to a rollback to communism.
The general ordered a rollback of the troops to the previous battle line.

WordNet 3.0 Sense Numbers: 1

Sense Number 3: the restoration of computer data of an earlier state

Commentary: ROLLBACK[+event][+reversion][+restoration][+data][+computer]
NOTE: narrow technical usage referring to computer data restoration

After the computer crash, we were able to obtain a rollback of the data to yesterday.
The system administrator does nightly backups so he can provide rollbacks in case data gets accidentally deleted.

WordNet 0.0 Sense Numbers: 2