reign² v [I] 1 to be the ruler of a country 统治国家 2 the reigning champion the most recent winner of a competition 本届冠军，现任冠军 3formal to be the main feature or feeling of a situation 【正式】 〔特征或情感〕盛行; 占优势: Confusion reigned among members of the jury this week. 这个星期，陪审团成员一片困惑。