Definitions for "retroactive"
Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective.
Same as Retrospective.
Keywords:  tot, pell, halfway, earlier, stimuli
Effective as of an earlier date than the date enacted.
Effective as of a past date.
descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously
Keywords:  facto, things, post, law, increase
affecting things past; "retroactive tax increase"; "an ex-post-facto law"; "retro pay"