v.
Pronunciation: ə - ' n ə l
Function: transitive verb
Inflected Form: an · nulled ; an · nul · ling
Etymology: Middle English annullen, from Anglo-French annuller, from Late Latin annullare, from Latin ad- + nullus not any ― more at NULL
Date: 15th century
1 : to reduce to nothing : OBLITERATE
2 : to make ineffective or inoperative : NEUTRALIZE < annul the drug's effect>
3 : to declare or make legally invalid or void <wants the marriage annulled >
synonyms see NULLIFY