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Adjective: proactive  prow'ak-tiv
  1. (of a policy, person or action) controlling a situation by causing something to happen rather than waiting to respond to it after it happens
    "The company took a proactive approach to cybersecurity"
     
  2. (psychology) descriptive of any event or stimulus or process that has an effect on events or stimuli or processes that occur subsequently
    "proactive inhibition"; "proactive interference"

See also: active

Antonym: retroactive

Encyclopedia: Proactive, Preemptive Operations Group