1 looking again at the past 回顾的: a retrospective analysis of historical events对历史大事的回顾分析
2 (used about laws, decisions, payments, etc) intended to take effect from a date in the past (指法律、裁决、款项支付等)有追溯效力的,溯及既往的: Is this new tax law retrospective?这条新的税法有追溯效力吗? ➔retrospectivelyadv