D defs.my
Entry 2 senses Webster, 1913

Regulation

/(-l?"sh?n)/ · Reg·u·la·tion · IPA /ˌɹɛɡjʊˈleɪʃən/
01 n. The act of regulating, or the state of being regulated.
  1. 1.
    The act of regulating, or the state of being regulated.
    “The temper and regulation of our own minds.” Macaulay.
  2. 2.
    A rule or order prescribed for management or government; prescription; a regulating principle; a governing direction; precept; law; as, the regulations of a society or a school.
Phrases & compounds
Regulation sword, cap, uniform, — a sword, cap, uniform, etc., of the kind or quality prescribed by the official regulations.