(especially of laws or other established rules, usages, etc.) to make void or null; abolish; cancel; invalidate:
to annul a marriage.
to reduce to nothing; obliterate.
to cancel (a regularly scheduled train, plane, social event, etc.) for one day or one time only.
Contemporary Examples

By all accounts, Rafsanjani has been the main force behind the scenes trying to annul the elections.
Friday Surprise in Iran? Reza Aslan July 15, 2009

Two years later, the reprimand was overturned, but Mia was unsuccessful in her bid to annul the adoptions.
The Woody Allen Allegations: Not So Fast Robert B. Weide January 26, 2014

Historical Examples

The same gentleman next contended that law can annul Treaties.
Abridgment of the Debates of Congress, from 1789 to 1856, Vol. I (of 16) Thomas Hart Benton

You ought to annul the debt by paying small sums on account.
The Memoires of Casanova, Complete Jacques Casanova de Seingalt

He then proceeded to annul, by his own sole authority, a long series of statutes.
The History of England from the Accession of James II. Thomas Babington Macaulay

He was, therefore, competent to annul virtually a penal statute.
“Stops” Paul Allardyce

Not to seek to change the stern decree; not to annul those bitter phrases: his dissolute career—the memory of his misspent youth!
Satan Sanderson Hallie Erminie Rives

For no man’s law, no vow, can annul the commandment and ordinance of God.
The Confession of Faith Various

Then Mr. Bainrothe has concluded to annul the condition of my marriage before leaving the asylum.
Miriam Monfort Catherine A. Warfield

But as no law of man can annul the commandment of God, so neither can it be done by any vow.
The Confession of Faith Various

verb -nuls, -nulling, -nulled
(transitive) to make (something, esp a law or marriage) void; cancel the validity of; abolish

late 14c., from Old French anuller (13c.) or directly from Late Latin annullare “to make to nothing,” from Latin ad- “to” (see ad-) + nullum, neuter of nullus “nothing” (see null). Related: Annulled; annulling.


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