late 14c., restoracioun, "a means of healing or restoring health, a cure; renewing of something lost," from Old French restoration (Modern French restauration) and directly from Late Latin restorationem (nominative restoratio) "a restoration, renewal," noun of action from past-participle stem of Latin restaurare (see restore).
Also used in Middle English were restorement (14c.), restoring (mid-14c.). From mid-15c. as "the repairing of a damaged or deteriorated building;" from c. 1500 as "a restoring to a former state."
The Restoration (1718) refers to the re-establishment of the monarchy under Charles II in 1660 (and by extension his whole reign); as an adjective in reference to the English theater of this period, by 1898. In French history, it refers to the (briefly interrupted) reinstatement of the Bourbons in 1814.