regulation in WordNet English dictionary

1. an authoritative rule
   regulation  ordinance 
   
2. the act of bringing to uniformity; making regular
   regulation  regularization  regularisation 
   
3. the act of controlling or directing according to rule
   "fiscal regulations are in the hands of politicians"
   regulation  regulating 
   
4. a principle or condition that customarily governs behavior
   "it was his rule to take a walk before breakfast"; "short haircuts were the regulation"
   rule  regulation 
   
5. (embryology) the ability of an early embryo to continue normal development after its structure has been somehow damaged or altered
   regulation 
   
6. the state of being controlled or governed
   regulation 
   

1. prescribed by or according to regulation
   "regulation army equipment"
   regulation