[with obj.](一般作 be annulled)declare invalid (an official agreement, decision, or result) 宣告(协议、决定或结果)无效 the elections were annulled by the general amid renewed protests. 在新一轮抗议声中将军宣告选举无效。 ■declare (a marriage) to have had no legal existence 宣告(婚姻)无效 her first marriage was finally annulled by His Holiness. 她的第一次婚姻最终由罗马教皇宣告无效。
派生 annulment noun 语源
late Middle English : from Old French anuller, from late Latin annullare, from ad- 'to' + nullum 'nothing'