- To hinder; to impede; to prevent. - 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 judgement of
official misconduct; to arraign; as, to impeach a judge. See
Impeachment. - Hence, to charge with impropriety; to dishonor; to
bring discredit on; to call in question; as, to impeach one's motives
or conduct. - To challenge or discredit the credibility of, as of a
witness, or the validity of, as of commercial paper.