Hypertext Webster Gateway: "Retroactive"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Retroactive \Re`tro*act"ive\, a. [Cf. F. r['e]troactif.]
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.
From WordNet (r) 1.7 (wn)
retroactive
adj 1: (psychology) descriptive of any event or stimulus or process
that has an effect on the effects of events or stimuli
or process that occurred previously [ant: {proactive}]
2: affecting things past; "retroactive tax increase"; "an
ex-post-facto law"; "retro pay" [syn: {ex post facto}, {retro}]
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