(v) serve as a teacher or trusted counselor, Example:The famous professor mentored him during his years in graduate school; She is a fine lecturer but she doesn't like mentoring
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ From Mentor, the counselor of Telemachus, Gr. Me`ntwr, prop., counselor. Cf. Monitor. ] A wise and faithful counselor or monitor. [ 1913 Webster ]