Definition of retroactive
English to English adjective - descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously
source: WordNet 3.0 - Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective.
source: Webster 1913 adjective satellite - affecting things past
Retroactive tax increase. An ex-post-facto law. Retro pay.
source: WordNet 3.0
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