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Definition of impeach:

  1. Hence, to charge with impropriety; to dishonor; to bring discredit on; to call in question; as, to impeach one's motives or conduct.
  2. Hindrance; impeachment.
  3. To challenge or discredit the credibility of, as of a witness, or the validity of, as of commercial paper.
  4. 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.
  5. To hinder; to impede; to prevent.


reprimand, summon, imply, censure, accuse, incriminate, criminate.

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