(1):
(n.) A kind of gallows; an upright post with an arm projecting from the top, on which, formerly, malefactors were hanged in chains, and their bodies allowed to remain asa warning.
(2):
(n.) The projecting arm of a crane, from which the load is suspended; the jib.
(3):
(v. t.) To hang and expose on a gibbet.
(4):
(v. t.) To expose to infamy; to blacken.