RETROACTIVE

retroactive. Retroactive, a. affecting what is past, retrospective

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Re′tro‐act″ive (?), a. [[Cf. F. rétroactif.]] Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective. Beddoes. Retroactive law or statute (Law), one which operates to make criminal or punishable, or in any way expressly to affect, acts done prior to the passing of the law.