• (America) IPA: /ˈdʒin.jəs/, /ˈdʒi.ni.əs/
• (RP) IPA: /ˈdʒiː.nɪəs/

genius (plural geniuses)

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

   I think that would qualify as not smart, but genius... and a very stable genius at that!

   Synonyms: Thesaurus:genius

   Antonyms: idiot

2. Extraordinary mental capacity.
3. Inspiration, a mental leap, an extraordinary creative process.

   a work of genius.

4. (Roman mythology) The tutelary deity or spirit of a place or person.
   • a. 1645, John Milton, “Il Penseroso”, in Poems of Mr. John Milton, […] , London: Printed by Ruth Raworth for Humphrey Moſely,  […], published 1645, OCLC 606951673 ↗:

   • We talk of genius still, but with thought how changed! The genius of Augustus was a tutelary demon, to be sworn by and to receive offerings on an altar as a deity.

   Synonyms: tutelary deity, Thesaurus:spirit

• French: génie
• German: Genie
• Portuguese: génio (Portugal), gênio (Brazil)
• Russian: ге́ний
• Spanish: genio, genia

• German: Genialität
• Portuguese: genialidade
• Russian: гениа́льность
• Spanish: genio

genius (not comparable)

1. (informal) ingenious, very clever, or original.

   What a genius idea!