To accuse; to charge a liability upon ; to sue.To dispute, disparage, deny, or contradict; as, to impeach a judgment or decree; oras used in the rule that a jury cannot “impeach their verdict.” See Wolfgram v.Schoepke, 123 Wis. 19, 100 N. W. 1050.To proceed against a public officer for crime or misfeasance, before a proper court,by the presentation of a written accusation called “articles of impeachment.”In the law of evidence. To call in question the veracity of a witness, by means ofevidence adduced for that purpose.