mindmap root((事件)) occurrence implies any happening without intent, volition, or plan: a meeting that was a chance ~. event usually implies an occurrence of some importance and frequently one having evident antecedent causes: the sequence of ~s following the assassination. incident suggests an occurrence of brief duration or relatively slight importance: one of the minor ~s of the war. episode stresses the distinctiveness or apartness of an incident: recounted some amusing ~s from his youth. circumstance implies a specific detail attending an action or event: couldn't remember the exact ~s.