What is the meaning of falsify?

verb

• Make false by mutilation or addition; as of a message or story.
  • synonyms: distort, garble, warp
• Tamper, with the purpose of deception.
  • usage: "Fudge the figures"; "cook the books"; "falsify the data"
  • synonyms: fudge, manipulate, fake, cook, wangle, misrepresent
• Prove false.
  • usage: "Falsify a claim"
• Falsify knowingly.
  • usage: "She falsified the records"
• Insert words into texts, often falsifying it thereby.
  • synonyms: interpolate, alter