From French falsifier, from Late Latin falsificāre, present active infinitive of falsificō (make false, corrupt, counterfeit, falsify), from Latin falsificus, from falsus (false), corresponding to false +‎ -ify.


  • IPA(key): /ˈfɒlsɪfaɪ/
  • (file)


falsify (third-person singular simple present falsifies, present participle falsifying, simple past and past participle falsified)

  1. (transitive) To alter so as to make false; to make incorrect.
    to falsify a record or document
    • (Can we date this quote by Edmund Spenser and provide title, author’s full name, and other details?)
      The Irish bards use to forge and falsify everything as they list, to please or displease any man.
  2. (transitive) To misrepresent.
  3. (transitive) To prove to be false.
  4. (transitive) To counterfeit; to forge.
    to falsify coin
  5. (transitive, accounting) To show (an item of charge inserted in an account) to be wrong.
    (Can we find and add a quotation of Story to this entry?)
    • 1912, Peyton Boyle, The Federal Reporter: Cases Argued and Determined in the Circuit District Courts of the United States
      The chancery rules governing proceedings to surcharge and falsify accounts are applicable only where an account has been stated between the parties, or where something equivalent thereto has been done.
  6. (transitive, obsolete) To baffle or escape.
    • (Can we date this quote by Samuel Butler and provide title, author’s full name, and other details?)
      For disputants (as swordsmen use to fence / With blunted foyles) engage with blunted sense; / And as th' are wont to falsify a blow, / Use nothing else to pass upon a foe []
  7. (transitive, obsolete) To violate; to break by falsehood.
    to falsify one's faith or word
    (Can we find and add a quotation of Sir Philip Sidney to this entry?)

Derived termsEdit

Related termsEdit


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.

Further readingEdit