An accusation that a person has committed a crime against the state, such as treason.
A demonstration in a court of law, or before another finder of fact, that a witness was ingenuine before, and is therefore less likely to tell the truth now.
The act of calling into question or challenging the accuracy or propriety of something.
The act of impeaching or charging a public official with misconduct, especially if serious, often with the aim of having the official dismissed from office.
The state of being impeached.
The conduct of a lawsuit.