I. men ‧ tor 1 /ˈmentɔː $ -tɔːr/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Origin: Mentor , adviser of Odysseus's son Telemachus in the ancient Greek Odyssey by Homer ]
an experienced person who advises and helps a less experienced person
II. mentor 2 BrE AmE verb [transitive]
to be someone's mentor:
Now she mentors undergraduates who are training to be teachers.