retroactive

Adjective
  1. Descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously (synset 302602711)
    referred to in: psychological science, psychology - the science of mental life
  2. Affecting things past (synset 301890843)
    "retroactive tax increase"; "an ex-post-facto law"; "retro pay"
    similar to: retrospective - concerned with or related to the past
    same as: ex post facto, retro

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