1. (

• regulation ,
• ordinance

) an authoritative rule ;

2. (

• rule ,
• regulation

) a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation" ;

3. (

• regulation

) the state of being controlled or governed ;

4. (

• regulation

) (embryology) the ability of an early embryo to continue normal development after its structure has been somehow damaged or altered ;

5. (

• regulation ,
• regularization ,
• regularisation

) the act of bringing to uniformity; making regular ;

6. (

• regulation ,
• regulating

) the act of controlling or directing according to rule; "fiscal regulations are in the hands of politicians" ;

1. (

• regulation

) prescribed by or according to regulation; "regulation army equipment" ;