Based on old paradigm mentoring where a more senior person (in terms of age, position or experience) mentors a junior, reverse mentoring places the more junior person as the mentor.
Usually used when executives need to understand operations or technology that can be shared by shop floor, front-line or tech-savvy employees.
The key to success in reverse mentoring is the ability to create and maintain an attitude of openness to the experience and dissolve the barriers of status, power and position.