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.
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
v.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.