1.directions prescribed beforehand; the action of prescribing authoritative rules or directions;
I tried to follow her prescription for success
2.a drug that is available only with written instructions from a doctor or dentist to a pharmacist;
he told the doctor that he had been taking his prescription regularly
3.written instructions for an optician on the lenses for a given person
4.written instructions from a physician or dentist to a druggist concerning the form and dosage of a drug to be issued to a given patient
5.available only with a doctor's written prescription;
a prescription drug