guru
n. countablen. a person who is an expert in a specific subject and gives advice to others. You often use this for someone who knows a lot about business, technology, or health.
n. a recognized expert or influential teacher in a specific field, often possessing a large following. While originally referring to a spiritual guide in Hinduism or Buddhism, the modern secular sense is frequently used in business or lifestyle contexts.
She is a marketing guru who helps small businesses grow.
After years of successful investing, he became a financial guru for people looking to retire early.
The tech guru's keynote address was met with intense scrutiny by industry analysts who questioned the feasibility of his long-term vision for artificial intelligence.
Borrowed from Hindi गुरु (guru) / Punjabi ਗੁਰੂ (gurū), from Sanskrit गुरु (guru, “venerable, respectable”), originally "heavy" and in this sense cognate to English grieve and, more distantly, brute. Doublet of grave. A traditional, though flawed etymology based on the Advayataraka Upanishad (line 16) describes the syllables gu as “darkness” and ru as “destroyer”, thus ascribing the meaning of “one who destroys/dispels darkness” to the word.
Commonly used as a modifier before another noun, such as 'fitness guru' or 'management guru'.