D defs.my
Entry 2 senses Webster, 1913

Prescriptive

· Pre·scrip·tive · IPA /pɹɪˈskɹɪptɪv/
01 a. Consisting in, or acquired by, immemorial or long-continued use and enjoyment; as, a prescriptive right of title; pleading the continuance …
  1. 1.
    Consisting in, or acquired by, immemorial or long-continued use and enjoyment; as, a prescriptive right of title; pleading the continuance and authority of long custom.(Law)
    “The right to be drowsy in protracted toil has become prescriptive.” — J. M. Mason.
  2. 2.
    Of or pertaining to the doctrine that acceptable grammatical rules should be prescribed by authority, rather than be determined by common usage.