1 a private teacher, especially one who teaches an individual student or a very small group
2 (especially British English) a teacher whose job is to pay special attention to the studies or health, etc. of a student or a group of students his history tutor He was my personal tutor at university.She's in my tutor group at school.
3 (British English) a teacher, especially one who teaches adults or who has a special role in a school or college a part-time adult education tutor
4 (North American English) an assistant lecturer in a college
.....and 1 through 4 are definitions/descriptions of