(1):

(n.) A perjured person.

(2):

(v. t.) To cause to violate an oath or a vow; to cause to make oath knowingly to what is untrue; to make guilty of perjury; to forswear; to corrupt; - often used reflexively; as, he perjured himself.

(3):

(v. t.) To make a false oath to; to deceive by oaths and protestations.