Annul

To declare no longer valid
Found on http://www.hmcourts-service.gov.uk/infoabout/glossary/legal.htm

Annul

An·nul' transitive verb [ imperfect & past participle Annulled ; present participle & verbal noun Annulling .] [ French annuler , Late Latin annullare , annulare , from Latin ad to + nullus none, ...
Found on http://www.encyclo.co.uk/webster/A/87

Annul

• (a.) To make void or of no effect; to nullify; to abolish; to do away with; -- used appropriately of laws, decrees, edicts, decisions of courts, or other established rules, permanent usages, and the like, which are made void by component authority. • (a.) To reduce to nothing; to obliterate.
Found on http://thinkexist.com/dictionary/meaning/annul/

annul

annul (uh NUHL) To cancel; to invalidate, to rescind: 'The contract was annulled because it was not legally signed by both parties.'
Found on http://www.wordinfo.info/words/index/info/view_unit/1425/

annul

to make void, as to dissolve the bonds of marriage
Found on https://www.nycourts.gov/lawlibraries/glossary.shtml
No exact match found