To falsify is to alter or mangle something, like a message or document, in a way that distorts the meaning.

Since false things aren't true, to falsify something is to dishonestly change its meaning. If a friend tells you a story, and then you retell the story but change important facts, you falsified the story. If you lie in court — commit perjury — you're falsifying the facts. Faking someone else's signature is another type of falsifying, as is lying on your resume. Anytime you misrepresent the truth, you're falsifying.

Definitions of falsify

v make false by mutilation or addition; as of a message or story

distort, garble, warp
mangle, murder, mutilate
alter so as to make unrecognizable
Type of:
belie, misrepresent
represent falsely

v falsify knowingly

“She falsified the records”
correct, rectify, right
make right or correct
Type of:
change by reversal, reverse, turn
change to the contrary

v insert words into texts, often falsifying it thereby

alter, interpolate
Type of:
edit, redact
prepare for publication or presentation by correcting, revising, or adapting

v tamper, with the purpose of deception

falsify the data”
cook, fake, fudge, manipulate, misrepresent, wangle
manipulate by or as if by moving around components
Type of:
cheat, chisel
engage in deceitful behavior; practice trickery or fraud

v prove false

Falsify a claim”
Type of:
confute, disprove
prove to be false

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