To object to, especially in a formal statement. See Synonyms at object. To promise or affirm with earnest solemnity: "He continually protested his profound respect\u201d ( Frank Norris). Law To declare (a bill) dishonored or refused. Archaic To proclaim or make known: "unrough youths that even now/Protest their first of manhood\u201d ( Shakespeare). To express strong objection. To make an earnest avowal or affirmation. A formal declaration of disapproval or objection issued by a concerned person, group, or organization. An individual or collective gesture or display of disapproval. Law A formal statement drawn up by a notary for a creditor declaring that the debtor has refused to accept or honor a bill. Law A formal declaration made by a taxpayer stating that the tax demanded is illegal or excessive and reserving the right to contest it.