What does "jig" mean?

Additional senses

1. 2.A piece of sport; a trick; a prank. [Obs.] Is't not a fine jig, A precious cunning, in the late Protector Beau & Fl.
2. 3.A trolling bait, consisting of a bright spoon and a hook attached.
3. 4.(Mach.) (a) A small machine or handy tool; esp.: (Metal Working) A contrivance fastened to or inclosing a piece of work, and having hard steel surfaces to guide a tool, as a drill, or to form a shield or templet to work to, as in filing. (b) (Mining) An apparatus or a machine for jigging ore. Drill jig, a jig for guiding a drill. See Jig, 6 (a). -- Jig drilling, Jig filing (Metal Working), a process of drilling or filing in which the action of the tool is directed or limited by a jig. -- Jig saw, a sawing machine with a narrow, vertically reciprocating saw, used to cut curved and irregular lines, or ornamental patterns in openwork, a scroll saw; -- called also gig saw.
4. 5.To sing to the tune of a jig. Jig off a tune at the tongue's end. Shak.
5. 6.To trick or cheat; to cajole; to delude. Ford.
6. 7.(Mining) To sort or separate, as ore in a jigger or sieve. See Jigging, n.
7. 8.(Metal Working) To cut or form, as a piece of metal, in a jigging machine.
8. 9.To dance a jig; to skip about. You jig, you amble, and you lisp. Shak.