[+ obj] : to say officially that something is no longer valid : to make (something) legally void ▪ Their marriage was annulled.▪annul a contract/vote/election
— an·nul·ment/əˈnʌlmənt/noun, pluralan·nul·ments [count] ▪ They wanted an annulment of their marriage. [noncount] ▪ The couple has filed for annulment.