[ fawl-suh-fahy ]
See synonyms for: falsifyfalsifiedfalsifiesfalsifying on Thesaurus.com

verb (used with object),fal·si·fied, fal·si·fy·ing.
  1. to make false or incorrect, especially so as to deceive: to falsify income-tax reports.

  2. to alter fraudulently.

  1. to represent falsely: He falsified the history of his family to conceal his humble origins.

  2. to show or prove to be false; disprove: to falsify a theory.

verb (used without object),fal·si·fied, fal·si·fy·ing.
  1. to make false statements.

Origin of falsify

First recorded in 1400–50; late Middle English falsifien, from Middle French falsifier, from Late Latin falsificāre; see origin at false, -ify

synonym study For falsify

1, 3. See misrepresent.

Other words for falsify

Other words from falsify

  • fal·si·fi·a·ble [fawl-suh-fahy-uh-buhl] /ˌfɔl səˈfaɪ ə bəl/ adjective
  • fal·si·fi·ca·tion [fawl-suh-fi-key-shuhn], /ˌfɔl sə fɪˈkeɪ ʃən/, noun
  • fal·si·fi·er, noun
  • un·fal·si·fied, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use falsify in a sentence

British Dictionary definitions for falsify


/ (ˈfɔːlsɪˌfaɪ) /

verb-fies, -fying or -fied (tr)
  1. to make (a report, evidence, accounts, etc) false or inaccurate by alteration, esp in order to deceive

  2. to prove false; disprove

Origin of falsify

C15: from Old French falsifier, from Late Latin falsificāre, from Latin falsus false + facere to make

Derived forms of falsify

  • falsifiable, adjective
  • falsification (ˌfɔːlsɪfɪˈkeɪʃən), noun
  • falsifier, noun

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