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retroactive
 
Adjective retroactive has 2 senses
  1. retroactive - descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously
    Antonym:     proactive
  2. ex post facto, retroactive, retro - affecting things past; "retroactive tax increase"; "an ex-post-facto law"; "retro pay"
    Antonym: prospective (indirect, via retrospective)
retrifitment retript retrival retrive retrived retriwe retro retro grade retroactive retroactively retrobulbar neuritis retrobulbaris retroceding retrocession retroffiting retrofit retrofitment

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