Main Entry: gu·ru

Pronunciation: \ˈgu̇r-(ˌ)ü, ˈgü-(ˌ)rü also gə-ˈrü\

Function: noun

Inflected Form(s): plural gurus

Etymology: ultimately from Sanskrit guru, from guru, adjective, heavy, venerable — more at grieve

Date: 1613

1 : a personal religious teacher and spiritual guide in Hinduism
2 a : a teacher and especially intellectual guide in matters of fundamental concern b : one who is an acknowledged leader or chief proponent c : a person with knowledge or expertise : expert