To alter its original form or state, especially of a protein, by heat, acidity etc.
To take away a natural characteristic or inherent property of (a thing or a person).
To combine fissile material with nonfissile material in order to prevent its use in an atomic weapon.
To add something to (alcohol) that makes it unsuitable for consumption but leaves it suitable for most other purposes.
To genetically alter an extant species.
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 alter or make obscure, as with the intention to deceive, especially a document.
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.