1. formally charging a public official with misconduct in office
Usage: political/legal context
2. calling into question the credibility or validity of something
Usage: formal

Examples

• The House is impeaching the president for abuse of power.
• Congress spent months impeaching the official before the trial.
• The lawyer is impeaching the witness’s testimony.
• They are impeaching the validity of the research findings.
• The committee is impeaching the governor’s conduct.
• She is impeaching his credibility as a source.