descriptive of any event or stimulus or process that has an effect on events or stimuli or processes that occur subsequently;
(of a policy or person or action) controlling a situation by causing something to happen rather than waiting to respond to it after it happens
When investigating crime, the main choice of strategies has been presented as between reactive and proactive policing. 在犯罪侦查中
Last year, China achieved relatively rapid economic growth, thanks to its efforts in adhering to the principle of expanding domestic demand and its unswerving implementation of a proactive fiscal policy and a prudent monetary policy. 朱镕基说，去年，我们坚持扩大内需的方针，坚定地实施积极的财政政策和稳健的货币政策，实现了经济较快增长。
Members should take a proactive role with regard to the marketing of their college.