• synonyms


[ fawl-suh-fahy ]
/ ˈfɔl sə faɪ /

verb (used with object), fal·si·fied, fal·si·fy·ing.

to make false or incorrect, especially so as to deceive: to falsify income-tax reports.
to alter fraudulently.
to represent falsely: He falsified the history of his family to conceal his humble origins.
to show or prove to be false; disprove: to falsify a theory.

verb (used without object), fal·si·fied, fal·si·fy·ing.

to make false statements.


fibber, fabricator, prevaricator, storyteller, fabulist

Nearby words

falsework, falsie, falsies, falsifiable, falsification, falsify, falsity, falstaff, falstaffian, falster, faltboat

Origin of falsify

1400–50; late Middle English falsifien < Middle French falsifier < Late Latin falsificāre. See false, -ify
1, 3 See misrepresent.
4 rebut, discredit, refute, confute, controvert.
Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for falsifiers

  • On the other hand, they are great usurers and falsifiers of weights and measures, and merchandise, and coin; and liars and cheats.

    A Description of the Coasts of East Africa and Malabar|Duarte Barbosa
  • All the loathsome diseases were gathered into this moat to afflict the forgers and falsifiers.

    National Epics|Kate Milner Rabb
  • The life of Brutus offered good materials for the falsifiers of history, who worked with them after rhetorical fashion.

British Dictionary definitions for falsifiers


/ (ˈfɔːlsɪˌfaɪ) /

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

to make (a report, evidence, accounts, etc) false or inaccurate by alteration, esp in order to deceive
to prove false; disprove
Derived Formsfalsifiable, adjectivefalsification (ˌfɔːlsɪfɪˈkeɪʃən), nounfalsifier, noun

Word Origin for falsify

C15: from Old French falsifier, from Late Latin falsificāre, from Latin falsus false + 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 falsifiers



mid-15c., "to prove false," from Middle French falsifier (15c.), from Late Latin falsificare (see falsify). Meaning "to make false" is from c.1500. Earlier verb was simply falsen (c.1200). Related: Falsified; falsifying.

Online Etymology Dictionary, © 2010 Douglas Harper