To cause (someone) to go insane or become deranged.
To cause disorder in (something); to distort from its ideal state.
To cause to malfunction or become inoperative.
To alter or make obscure, as with the intention to deceive, especially a document.
To act as a medical doctor to.
To physically alter (medically or surgically) a living being in order to change growth or behavior.
To act as a medical doctor.
To genetically alter an extant species.
To make (someone) into an (academic) doctor; to confer a doctorate upon.
To adulterate, drug, or poison (drink).
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 fish, the friar skate.
A nickname for a person who has special knowledge or talents to manipulate or arrange transactions.