1. 专家；权威；领袖
A guru is a person who some people regard as an expert or leader.

2. 精神领袖；宗教领袖；（尤指印度教的）古鲁
A guru is a religious and spiritual leader and teacher, especially in Hinduism.

1. a Hindu or Buddhist religious leader and spiritual teacher

2. a recognized leader in some field or of some movement

e.g. a guru of genomics