1. To counterfeit; to forge; to make something false, or in imitation of that which is true; as, to falsify coin.

The Irish bards use to falsify every thing.

2. To disprove; to prove to be false; as, to falsify a record.

3. To violate; to break by falsehood; as, to falsify one's faith or word.

4. To show to be unsound, insufficient or not proof. [Not in use.]

His ample shield is falsified.