Definition of doctor:
(n) :
a
physician; a member of the
medical profession; one who is trained and licensed to heal the sick. The final examination and qualification may award a doctorate in which case the post-nominal letters are
MD in the
US; 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
"if you still feel unwell tomorrow, go and see your doctor."
(v) :
to act as a (medical) doctor to; to make (someone) into an (academic) doctor