wiz·ard 
(wĭzərd)
(wĭzərd)n.
1. One who practices magic; a sorcerer or magician.
2. A skilled or clever person: a wizard at math.
3. Archaic A sage.
adj.
1. Chiefly British Slang Excellent.
2. Archaic Of or relating to wizards or wizardry.
[Middle English wisard : wise, wise; see WISE1 + -ard, pejorative suff.; see -ARD.]