A tutor is a person employed in the education of others, either individually or in groups. To tutor (as a verb) is to perform the functions of a tutor.

In British, Australian, New Zealand, Italian, and some Canadian universities, a tutor is often, but not always, a postgraduate student or a lecturer assigned to conduct a seminar for undergraduate students, often known as a tutorial. The equivalent of this kind of tutor in the United States and the rest of Canada is known as a teaching assistant or graduate student instructor (GSI).

In the University of Cambridge, a Tutor is an officer of a college responsible for the pastoral care of a number of students in cognate disciplines, as against a Director of Studies who is responsible for the academic progress of a group of students in their own discipline, with both Tutors and Directors of Study answering to a Senior Tutor. In the University of Oxford, the colleges fuse pastoral and academic care into the single office of Fellow and Tutor, also known as a CUF Lecturer.