To make or declare insane. It is a general rule in the English law, that a man shall not be permitted to stultify himself; that is, he shall not be allowed to plead his insanity to avoid a contract. 2. In the United States, this rule seems to have been exploded, and the party may himself avoid his acts except those of record, and contracts for necessaries and services rendered, by allegation and proof of insanity.