verb (used with object), nul·li·fied, nul·li·fy·ing.

to render or declare legally void or inoperative: to nullify a contract.
to deprive (something) of value or effectiveness; make futile or of no consequence.

Origin of nullify

First recorded in 1585–95, nullify is from the Late Latin word nūllificāre to despise. See nulli-, -fy
Related formsnul·li·fi·er, nounre·nul·li·fy, verb (used with object), re·nul·li·fied, re·nul·li·fy·ing.un·nul·li·fied, adjective

Synonyms for nullify Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nullify

Contemporary Examples of nullify

Historical Examples of nullify

  • The ray does more than nullify gravity—can be made to reverse gravity!

  • Nor did he try to gloss over or strive to nullify his own dishonorable actions.

    Garrison's Finish

    W. B. M. Ferguson

  • It was his duty to nullify this mutiny if he could, and therefore he turned to the men again.

    Turned Adrift

    Harry Collingwood

  • Nothing could nullify it, nothing could take it away; it was almost their belief in life.

    Sons and Lovers

    David Herbert Lawrence

  • Every means was taken to nullify the value of the "palladium of British liberty."

British Dictionary definitions for nullify


verb -fies, -fying or -fied (tr)

to render legally void or of no effect
to render ineffective or useless; cancel out
Derived Formsnullification, nounnullifier, noun

Word Origin for nullify

C16: from Late Latin nullificāre to despise, from Latin nullus of no account + facere to make
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for nullify

1590s, from Late Latin nullificare "to esteem lightly, despise," literally "to make nothing," from Latin nullus "not any" (see null) + root of facere "to make" (see factitious). Related: Nullified; nullifying.

Online Etymology Dictionary, © 2010 Douglas Harper