Retroactive

[retrəʊ'æktɪv] or [,rɛtro'æktɪv]

Definition

(adj.) descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously .

Edited by Augustus--From WordNet

Definition

(a.) Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective.

Checker: Reginald

Synonyms and Synonymous

a. [1]. Reflex.[2]. Retrospective, that affects the past.

Inputed by Liza