Longman Dictionary of Contemporary English homepage

falsify

 verb
     
fal‧si‧fy past tense and past participle falsified, present participle falsifying, third person singular falsifies [transitive]
to change figures, records etc so that they contain false information:
The file was altered to falsify the evidence.
—falsification noun [uncountable and countable]
the falsification of records
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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