From The Collaborative International Dictionary of English v.0.48:
Juggler \Jug"gler\, n. [OE. jogelour, juglur, OF. jogleor,
jugleor, jongleor, F. jongleur, fr. L. joculator a jester,
joker, fr. joculus a little jest or joke, dim. of jocus jest,
joke. See Joke, and cf. Jongleur, Joculator.]
[1913 Webster]
1. One who juggles; one who practices or exhibits tricks by
sleight of hand; one skilled in legerdemain; a conjurer.
[Archaic]
Note: This sense is now expressed by magician or
conjurer.
[1913 Webster +PJC]
As nimble jugglers that deceive the eye. --Shak.
[1913 Webster]
Jugglers and impostors do daily delude them.
--Sir T.
Browne.
[1913 Webster]
2. A deceiver; a cheat. --Shak.
[1913 Webster]
3. A person who juggles objects, i. e. who maintains several
objects in the air by passing them in turn from one hand
to another.
[PJC]