n.
   - a person who is qualified to practise medicine. ▸N. Amer. a qualified dentist or veterinary surgeon. 
- 
(Doctor)
 a person who holds the highest university degree.
- an artificial fishing fly.
v.
   - adulterate, tamper with, or falsify.
- informal practise medicine.
- Brit. remove the sexual organs of (an animal) so that it cannot reproduce.
Phrase
  
    - be what the doctor ordered
 informal be beneficial or desirable.
- go for the doctor
 Austral./NZ informal make an all-out effort.
 
  Derivative
  
    - doctoring n.
- doctorly adj.
 
  Etymology
  ME (in the senses ‘learned person’ and ‘Doctor of the Church’): via OFr. from L. doctor ‘teacher’.