Definitionen
1.NounThe act of calling into question or challenging the accuracy or propriety of something.
2.NounA 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.
3.NounAn accusation that a person has committed a crime against the state, such as treason.
4.NounThe act of impeaching or charging a public official with misconduct, especially if serious, often with the aim of having the official dismissed from office.
5.NounThe state of being impeached.
6.NounHindrance; impediment; obstruction.