genius

A genius is someone with an amazing mental or creative ability. (noun)

See genius in Webster's New World College Dictionary

noun pl. geniuses

1. according to ancient Roman belief, a guardian spirit assigned to a person at birth; tutelary deity
2. the guardian spirit of any person, place, etc.
3. either of two spirits, one good and one evil, supposed to influence one's destiny
4. a person considered as having strong influence over another
jinni
the personification of a quality
particular character or essential spirit or nature of a nation, place, age, etc.
a great natural ability (for a particular activity); strong disposition or inclination
1. great mental capacity and inventive ability; esp., great and original creative ability in some art, science, etc.
2. a person having such capacity or ability
3. popularly any person with a very high IQ

See genius in American Heritage Dictionary 4

(jēnˈyəs)

noun pl. gen·ius·es

a. Extraordinary intellectual and creative power.
b. A person of extraordinary intellect and talent: “One is not born a genius, one becomes a genius” (Simone de Beauvoir).
c. A person who has an exceptionally high intelligence quotient, typically above 140.
a. A strong natural talent, aptitude, or inclination: has a genius for choosing the right words.
b. One who has such a talent or inclination: a genius at diplomacy.
The prevailing spirit or distinctive character, as of a place, a person, or an era: the genius of Elizabethan England.
pl. ge·ni·i (jēˈnē-īˌ) Roman Mythology A tutelary deity or guardian spirit of a person or place.
A person who has great influence over another.
A jinni in Muslim mythology.