'annul' definitions:

Definition of 'annul'

From: WordNet
verb
Declare invalid; "The contract was annulled"; "void a plea" [syn: invalidate, annul, quash, void, avoid, nullify] [ant: formalise, formalize, validate]
verb
Cancel officially; "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence" [syn: revoke, annul, lift, countermand, reverse, repeal, overturn, rescind, vacate]

Words containing 'annul'