0 an official announcement that something such as a law, agreement, or marriage no longer exists, or the process of making this announcement: --
The discovery of the election fraud has led to the annulment of 50,000 votes.
Judges only grant marriage annulments in exceptional circumstances.
He came to power following the military's controversial annulment of the presidential election.
Their short marriage ended in divorce, but now they were both seeking a church annulment.