Make false by mutilation or addition

• Prove false
• Insert words into texts
• The act of determining that something is false
• As of a message or story

WordNet Word definitions in WordNet
n. the act of determining that something is false [syn: falsification , disproof , refutation ]

Wiktionary Word definitions in Wiktionary
vb. (present participle of falsify English)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Falsify \Fal"si*fy\, v. t. [imp. & p. p. Falsified ; p. pr. & vb. n. Falsifying .] [L. falsus false + -ly: cf. F. falsifier. See False , a.] To make false; to represent falsely. The Irish bards use to forge and falsify everything as they list, to please ...