c. 1300, "act of putting to death on the gallows," verbal noun from hang (v.). Meaning "piece of drapery on the wall of a room" is late 15c. Hangings "curtains, tapestry" is from 1640s.
late 12c., present-participle adjective from hang (v.). Hanging gardens (of Babylon), one of the wonders of the world, is Latin pensiles horti, Greek kremastoi kepoi. Hanging judge first recorded 1848.