For our general use on FFL I feel this more concise usage fits to our needs. We all kind of know it when we see it. It covers the Western mystics that way too and it seems a fair use to describe a number of legitimate gurus. As such even a number of people on BATGAP could be that, as Guru. -Buck
“..a guru is "He [the person] who bestows that nature which transcend the qualities is said to be guru". And, A guru is a teacher, but not just any teacher; - The word indicates a teacher who imparts transcendental knowledge.