Definitionen
1.VerbTo hinder, impede, or prevent.
2.VerbTo bring a legal proceeding against a public official."President Clinton was impeached by the House in November 1998, but since the Senate acquitted him, he was not removed from office."
3.VerbTo charge with impropriety; to discredit; to call into question.
4.VerbTo demonstrate in court that a testimony under oath contradicts another testimony from the same person, usually one taken during deposition.