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(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.
Historical Examples

The Landsgemeinde is, in fact, the supreme court, which approves or annuls.
The Story of Switzerland Lina Hug

Only one thing can destroy it and that is when it annuls its past and weakens at the heart.
Our Part in the Great War Arthur Gleason

Here is my consent to a divorce—my full confession of the fraud which annuls the marriage.
The Lady of Lyons Edward Bulwer Lytton

According to the Hanifite jurists, this is a deed of gift which annuls all other rights of property.
The Faith of Islam Edward Sell

This is rendered by Dr Stubbs in the margin: ‘He annuls the truce and all the acts of the chancellor passed under the old seal.’
Feudal England — Historical Studies On The Eleventh And Twelfth Centuries J.H. Round

Virginia repeals that ordinance, annuls that bond of union, breaks that link of confederation.
American Eloquence, Volume IV. (of 4) Various

And how it annuls and obliterates whatever precepts of Heaven are written deepest within us?
The Marble Faun, Volume II. Nathaniel Hawthorne

This doctrine of grace, said his adversaries, annuls the sacraments, and contradicts baptismal regeneration.
History of the Reformation in the Sixteenth Century, Volume V J. H. Merle d’Aubigné

The latter at once concludes and annuls totemic tribal organization.
Elements of Folk Psychology Wilhelm Wundt

But thy prior marriage to this lady, annuls the subsequent, and my cousin Harry is not now thy heir.
Wild Oats John O’Keeffe

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

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.