Mentoring

People ask me if Marion was my mentor, or simply assume she was. Mentoring is a term that's thrown around a lot these days, and I often wonder what it really means. So I looked up the definition and found:

1. a wise and trusted counselor or teacher; 

2.an influential senior sponsor or supporter.

The definition gives me four essential qualifying relationships: counselor, teacher, sponsor, or supporter. That covers a whole lot of territory. Half the science fiction/fantasy community would go on my list, either as mentors or mentees. I need a narrower definition.