Annul (&unr_;), v. t. [imp. & p. p. Annulled (&unr_;); p. pr. & vb. n. Annulling.] [F. annuler, LL. annullare, annulare, fr. L. ad to + nullus none, nullum, neut., nothing. See Null, a.] 1. To reduce to nothing; to obliterate.
[1913 Webster]

Light, the prime work of God, to me's extinct.
And all her various objects of delight
Annulled. Milton.
[1913 Webster]

2. 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.
[1913 Webster]

Do they mean to annul laws of inestimable value to our liberties? Burke.
[1913 Webster]

Syn. -- To abolish; abrogate; repeal; cancel; reverse; rescind; revoke; nullify; destroy. See Abolish.
[1913 Webster]