verb, -fied, -fy⋅ing.| 1. | to make false or incorrect, esp. so as to deceive: to falsify income-tax reports. |
| 2. | to alter fraudulently. |
| 3. | to represent falsely: He falsified the history of his family to conceal his humble origins. |
| 4. | to show or prove to be false; disprove: to falsify a theory. |
| 5. | to make false statements. |