noun, plural gen·ius·es for 2, 3, 8, gen·i·i [jee-nee-ahy] /ˈdʒi niˌaɪ/ for 6, 7, 9, 10.
Origin of genius
noun plural -uses or for senses 5, 6 genii (ˈdʒiːnɪˌaɪ)
- the guiding spirit who attends a person from birth to death
- the guardian spirit of a place, group of people, or institution
Word Origin for genius
late 14c., "tutelary god (classical or pagan)," from Latin genius "guardian deity or spirit which watches over each person from birth; spirit, incarnation, wit, talent;" also "prophetic skill," originally "generative power," from root of gignere "beget, produce" (see kin), from PIE root *gen- "produce." Sense of "characteristic disposition" is from 1580s. Meaning "person of natural intelligence or talent" and that of "natural ability" are first recorded 1640s.