tutor

Concise Oxford English Dictionary © 2008 Oxford University Press:
tutor/ˈtjuːtə(r)/

▶noun

• 1 a private teacher, typically one who teaches a single pupil or a very small group.

  ■ chiefly Brit. a university or college teacher responsible for assigned students.

  ■ US an assistant lecturer in a college or university.

• 2 Brit. a book of instruction in a particular subject.

▶verb act as a tutor to.

■ work as a tutor.

– derivatives
tutorage noun,
tutorship noun.

– origin ME: from OFr. tutour or L. tutor, from tueri ‘to watch, guard’.