transitive verb annulled -·nulled′, annulling -·nul′·ling

1. to do away with; put an end to
2. to make no longer binding under the law; invalidate; cancel

Etymology: ME annullen < OFr anuller < LL(Ec) annullare, to bring to nothing < L ad-, to + nullum, nothing, neut. of nullus: see null