<p><strong>Noun</strong></p><ul><li>A person licensed to practice medicine, as a physician, surgeon, dentist, or veterinarian.</li><li>A person who has been awarded a doctor's degree.</li><li>Doctor of the Church.</li><li>Older Slang: A cook, as at a camp or on a ship.</li><li>Machinery: Any of various minor mechanical devices, especially one designed to remedy an undesirable characteristic of an automatic process.</li><li>Angling: Any of several artificial flies, especially the silver doctor.</li><li>An eminent scholar and teacher.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>To give medical treatment to; act as a physician to.</li><li>To treat (an ailment); apply remedies to.</li><li>To restore to original or working condition; repair; mend.</li><li>To tamper with; falsify.</li><li>To add a foreign substance to; adulterate.</li><li>To revise, alter, or adapt (a photograph, manuscript, etc.) in order to serve a specific purpose or to improve the material.</li><li>To award a doctorate to.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>To practice medicine.</li><li>Older Use: To take medicine; receive medical treatment.</li></ul>