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rollback (n.)

also roll-back; 1937 as "action of rolling backward;" 1942, American English, as "a reduction" in prices, etc., a journalist's and advertiser's word, from the verbal phrase; see roll (v.) + back (adv.).

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Definitions of rollback from WordNet

rollback (n.)
the act of forcing the enemy to withdraw;
Synonyms: push back
rollback (n.)
reducing prices back to some earlier level;
From wordnet.princeton.edu