I. verb — [with obj.] 1. declare invalid (an official agreement, decision, or result) • the elections were annulled by the general amid renewed protests.
2. declare (a marriage) to have had no legal existence. • her first marriage was finally annulled by His Holiness.
– origin late Middle English: from Old French anuller, from late Latin annullare, from ad- ‘to’ + nullum ‘nothing’.