Doctor meaning : 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. 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. A veterinarian; a medical practitioner who treats non-human animals. A nickname for a person who has special knowledge or talents to manipulate or arrange transactions. A teacher; one skilled in a profession or a branch of knowledge; a learned man. Any mechanical contrivance intended to remedy a difficulty or serve some purpose in an exigency. A fish, the friar skate. To act as a medical doctor to. To act as a medical doctor. To make (someone) into an (academic) doctor; to confer a doctorate upon. To physically alter (medically or surgically) a living being in order to change growth or behavior. To genetically alter an extant species. To alter or make obscure, as with the intention to deceive, especially a document. To take medicine.