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From The Collaborative International Dictionary of English v.0.48:
Regulation \Reg`u*la"tion\ (-l?"sh?n), n. 1. The act of regulating, or the state of being regulated. [1913 Webster] The temper and regulation of our own minds. --Macaulay. [1913 Webster] 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. [1913 Webster] Regulation sword, cap, uniform, etc. (Mil.), a sword, cap, uniform, etc., of the kind or quality prescribed by the official regulations. [1913 Webster] Syn: Law; rule; method; principle; order; precept. See Law. [1913 Webster]