verb

1. To restrain within boundaries; to limit; to confine

   “After suffering diahrroea, the patient was restricted to a diet of rice, cold meat, and yoghurt.”

2. (specifically) To consider (a function) as defined on a subset of its original domain.

Synonyms: bound, circumscribe, coerce, curb, limit, repress, restrain, withstrain

adjective

1. Limited within bounds.

2. Available only to certain authorized groups of people.

   “a restricted military document”

3. Only available to customers who do not belong to racial, ethnic or religious minorities.

   “This hotel is restricted: no Blacks.”