DOCTOR

noun

1. A physician; a member of the medical profession; one who is trained and licensed to heal the sick or injured. The final examination and qualification may award a doctor degree in which case the post-nominal letters are D.O., DPM, M.D., DMD, DDS, in the US or MBBS in the UK.
2. A person who has attained a doctorate, such as a Ph.D. or Th.D. or one of many other terminal degrees conferred by a college or university.
3. A veterinarian; a medical practitioner who treats non-human animals.

verb

1. To act as a medical doctor to.
2. To act as a medical doctor.
3. To make (someone) into an (academic) doctor; to confer a doctorate upon.