Prescription

In general, the word prescriptive refers to refer to normative judgments, i.e. judgments about what is good or bad, such as:

Prescriptive analytics, third and final phase of business analytics
Linguistic prescriptivism, the laying down of normative language rules
Prescriptive (normative) economics, branch of economics that incorporates value judgments
Prescriptive ethics, as distinct from meta-ethics and descriptive ethics

Other uses include:

Health care

Medical prescription, a plan of care written by a physician or other health care professional
- Prescription drug, a drug available only if prescribed by a medical prescription
Eyeglass prescription, written by an ophthalmologist or an optometrist for individuals with eye related concerns.

Custom (law), a right enjoyed through long use
Easement by prescription, acquisition of private property rights through uncontested use
Prescription (sovereignty transfer), acquisition of sovereignty through uncontested use
Period of prescription, in civil law jurisdictions, the time limit within which a lawsuit must be brought
Prescribed sum, the maximum fine that may be imposed on summary conviction of certain offences in the United Kingdom
Prescribed senior official, an individual who will be refused admission into Canada because of war crimes or crimes against humanity