[n] the act of controlling or directing according to rule; "fiscal regulations are in the hands of politicians"
[n] the act of bringing to uniformity; making regular
[n] a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation"
[n] an authoritative rule
[n] (embryology) the ability of an early embryo to continue normal development after its structure has been somehow damaged or altered
[n] the state of being controlled or governed
[adj] prescribed by or according to regulation; "regulation army equipment"