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annul

[uh-nuhl] /əˈnʌl/
verb (used with object), annulled, annulling.
1.
(especially of laws or other established rules, usages, etc.) to make void or null; abolish; cancel; invalidate:
to annul a marriage.
2.
to reduce to nothing; obliterate.
3.
to cancel (a regularly scheduled train, plane, social event, etc.) for one day or one time only.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Anglo-French annuler < Late Latin adnūllāre render null (calque of Greek exoudeneîn), equivalent to ad- ad- + -nullāre, verbal derivative of Latin nūllus no, not any
Related forms
annullable, adjective
self-annulling, adjective
unannullable, adjective
unannulled, adjective
Can be confused
anal, annual, annul.
Synonyms
1. nullify; rescind, repeal.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for annulling

annul

/əˈnʌl/
verb -nuls, -nulling, -nulled
1.
(transitive) to make (something, esp a law or marriage) void; cancel the validity of; abolish
Derived Forms
annullable, adjective
Word Origin
C14: from Old French annuller, from Late Latin annullāre to bring to nothing, from Latin nullus not any; see null
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for annulling

annul

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.

Online Etymology Dictionary, © 2010 Douglas Harper
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