Definition of "guru" in English

noun

1. In Indian traditions: a spiritual teacher who transmits knowledge to a shishya.

2. (India) Any general teacher (as a term of respect).

3. (sometimes humorous) An influential advisor or mentor.

4. (derogatory) A fraudster or conman relying on a projected air of confidence in an obscure field.

verb

1. To act as a guru; to give wise advice