Definition of "genius" in English

noun

1. (countable) Someone possessing extraordinary intelligence or skill; especially somebody who has demonstrated this by a creative or original work in science, music, art, etc.

   • She's a genius; she won a Nobel Prize at fifteen!

2. (uncountable) Extraordinary mental capacity.

3. (uncountable) Inspiration, a mental leap, an extraordinary creative process.

   • a work of genius
   • to add a dash of cinnamon amid such umami was pure genius

4. (countable, Roman mythology, also figuratively) The tutelary deity or spirit of a place or person.

   • and the genius of the place: the growing enthusiasm for codified standards in the Army and Navy

adjective

1. (informal) Ingenious, brilliant, very clever, or original.

   • What a genius idea!