The Collaborative International Dictionary of English v.0.48:

Wizard \Wiz"ard\, a.
   1. Enchanting; charming. --Collins.
      [1913 Webster]

   2. Haunted by wizards.
      [1913 Webster]

            Where Deva spreads her wizard stream. --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wizard \Wiz"ard\, n. [Probably from wise + -ard.]
   1. A wise man; a sage. [Obs.]
      [1913 Webster]

            See how from far upon the eastern road
            The star-led wizards [Magi] haste with odors sweet!
                                                  --Milton.
      [1913 Webster]

   2. One devoted to the black art; a magician; a conjurer; a
      sorcerer; an enchanter.
      [1913 Webster]

            The wily wizard must be caught.       --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

wizard
    adj 1: possessing or using or characteristic of or appropriate
           to supernatural powers; "charming incantations"; "magic
           signs that protect against adverse influence"; "a magical
           spell"; "'tis now the very witching time of night"-
           Shakespeare; "wizard wands"; "wizardly powers" [syn:
           charming, magic, magical, sorcerous,
           witching(a), wizard(a), wizardly]
    n 1: someone who is dazzlingly skilled in any field [syn: ace,
         adept, champion, sensation, maven, mavin,
         virtuoso, genius, hotshot, star, superstar,
         whiz, whizz, wizard, wiz]
    2: one who practices magic or sorcery [syn: sorcerer,
       magician, wizard, necromancer, thaumaturge,
       thaumaturgist]

Moby Thesaurus II by Grady Ward, 1.0:

87 Moby Thesaurus words for "wizard":
   Comus, Faust, OK, ace, ace-high, artist, authority, bad, bang-up,
   bonzer, boss, bully, but good, conjurer, cool, corking,
   crackerjack, dandy, delicious, diabolist, diviner, dowser, ducky,
   enchanter, fab, fine and dandy, first-rater, gear, genius,
   good hand, great, groovy, heavy, hot, hunky-dory, jam-up,
   just dandy, keen, mage, magician, magus, mahatma, man of genius,
   marvy, master, master hand, mastermind, mean, miracle-worker, neat,
   necromancer, nifty, nobby, okay, out of sight, past master, peachy,
   peachy-keen, practiced hand, prodigy, professional, proficient,
   ripping, rum, sage, scrumptious, skilled hand, slap-up, smashing,
   solid, something else, sorcerer, spiffing, spiffy, star, stunning,
   superstar, swell, thaumaturge, thaumaturgist, theurgist,
   topnotcher, tough, virtuoso, warlock, water witch, whiz



The Jargon File (version 4.4.7, 29 Dec 2003):

wizard
 n.

    1. Transitively, a person who knows how a complex piece of software or
    hardware works (that is, who groks it); esp. someone who can find and fix
    bugs quickly in an emergency. Someone is a hacker if he or she has
    general hacking ability, but is a wizard with respect to something only if
    he or she has specific detailed knowledge of that thing. A good hacker
    could become a wizard for something given the time to study it.

    2. The term ?wizard? is also used intransitively of someone who has
    extremely high-level hacking or problem-solving ability.

    3. A person who is permitted to do things forbidden to ordinary people; one
    who has wheel privileges on a system.

    4. A Unix expert, esp. a Unix systems programmer. This usage is well enough
    established that ?Unix Wizard? is a recognized job title at some
    corporations and to most headhunters.

    See guru, lord high fixer. See also deep magic, heavy wizardry, 
    incantation, magic, mutter, rain dance, voodoo programming, wave
    a dead chicken.


The Free On-line Dictionary of Computing (30 December 2018):

wizard

   1. A person who knows how a complex piece of software or
   hardware works (that is, who groks it); especially someone
   who can find and fix bugs quickly in an emergency.  Someone is
   a hacker if he or she has general hacking ability, but is a
   wizard with respect to something only if he or she has
   specific detailed knowledge of that thing.  A good hacker
   could become a wizard for something given the time to study
   it.

   2. A person who is permitted to do things forbidden to
   ordinary people; one who has wheel privileges on a system.

   3. A Unix expert, especially a Unix systems programmer.  This
   usage is well enough established that "Unix Wizard" is a
   recognised job title at some corporations and to most
   headhunters.

   See guru, lord high fixer.  See also deep magic, heavy
   wizardry, incantation, magic, mutter, rain dance,
   voodoo programming, wave a dead chicken.

   4. An interactive help utility that guides the user through a
   potentially complex task, such as configuring a PPP driver
   to work with a new modem.  Wizards are often implemented as
   a sequence of dialog boxes which the user can move forward
   and backward through, filling in the details required.  The
   implication is that the expertise of a human wizard in one of
   the above senses is encapsulated in the software wizard,
   allowing the average user to perform expertly.

   [Jargon File]

   (1998-09-07)


Easton's 1897 Bible Dictionary:

Wizard
   a pretender to supernatural knowledge and power, "a knowing
   one," as the original Hebrew word signifies. Such an one was
   forbidden on pain of death to practise his deceptions (Lev.
   19:31; 20:6, 27; 1 Sam. 28:3; Isa. 8:19; 19:3).