‖ /mhw>, n. [ Hind. gurū a spiritual parent or teacher, Skr. guru heavy, noble, venerable, teacher. Cf. Grief. ] 1. A spiritual teacher, guide, or confessor among the Hindus; a guru. Malcom. [ 1913 Webster ]

2. def>one who has expert knowledge of a technical area and serves as an advisor to others; an expert and teacher. Usually written guru. [ PJC ]

3. def>an intellectual or spiritual guide or advisor; a mentor. Usually written guru. [ PJC ]