v. To hinder; to impede; to prevent.v. To charge with a crime or misdemeanor; to accuse; especially to charge (a public officer), before a competent tribunal, with misbehavior in office; to cite before a tribunal for judgment of official misconduct; to arraign. See Impeachment.v. Hence, to charge with impropriety; to dishonor; to bring discredit on; to call in question.v. To challenge or discredit the credibility of, as of a witness, or the validity of, as of commercial paper.n. Hindrance; impeachment.