1. (n.)wizard a person who practices magic; magician or sorcerer.
2. wizard a person of amazing skill or accomplishment: a wizard at chemistry.
3. (adj.)wizard of or pertaining to a wizard or wizardry; magic; enchanted.
4. wizard Brit. Slang. superb.
Etymology: (1400–50; late ME wisard)
Definition of 'Wizard'
Princeton's WordNet
1. (noun)ace, adept, champion, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz someone who is dazzlingly skilled in any field
2. (adj)sorcerer, magician, wizard, necromancer, thaumaturge, thaumaturgist one who practices magic or sorcery
3. (adj)charming, magic, magical, sorcerous, witching(a), wizard(a), wizardly 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"
4. (noun)Wizard one devoted to the black art; a magician; a conjurer; a sorcerer; an enchanter
Definitions of 'Wizard'
The New Hacker's Dictionary
1. Wizard 1. Transitively, a person who knows how a complex piece of software
or hardwareworks (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.
Definitions of Wizard 
Afrikaans: towenaar, slimmerd
Arabic: ساحِر
Bulgarian: магъосник
Brazilian: feiticeiro
Czech: kouzelník
German: der Hexenmeister, der Zau
Danish: troldmand
Greek: μάγος
Spanish: mago, brujo, hechicero
Estonian: võlur
Farsi: جادوگر
Finnish: velho
French: magicien
Hebrew: קוֹסֵם
Hindi: जादूगर
Croatian: čarobnjak
Hungarian: varázsló
Indonesian: penyihir
Icelandic: galdra-/töframaður
Italian: mago
Japanese: 魔法使い
Korean: 마법사
Lithuanian: burtininkas
Latvian: burvis
Malay: lelaki tukang sihir
Dutch: tovenaar
Norwegian: trollmann
Polish: czarnoksiężnik
Persian: جادوگر
Pashto: كوډګر،جادو ګر، ساحر، مدار
Portuguese: feiticeiro
Romanian: vrăjitor; magician
Russian: волшебник
Slovak: čarodejník
Slovenian: čarovnik
Serbian: čarobnjak
Swedish: trollkarl, häxmästare
Thai: พ่อมด
Turkish: büyücü, sihirbaz
Taiwanese: 巫師
Ukrainian: чарівник, маг
Urdu: جادو گر
Vietnamese: thầy phù thủy
Chinese: 男巫
