Rule (5)
'rule' is the definition.
(I know that rule can be written as reign)
This is all the clue.
(Other definitions for reign that I've seen before include "Monarch's period" , "Period of the rule of a sovereign" , "Sit on a throne" , "Rule over in Niger" , "Rule of monarch" .)
'rule' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for edict that I've seen before include "Injunction" , "Decree by authority" , "Declaration" , "Legally binding command" , "Decree, order" .)
'rule' is the definition.
(I know that law is a type of rule)
This is the entire clue.
(Other definitions for law that I've seen before include "Rule of conduct" , "Regulation" , "'Possession is nine points of the ...'" , "Commandment" , "Rule prohibiting certain actions" .)
'rule' is the definition.
(I know that rule can be written as govern)
This is all the clue.
(Other definitions for govern that I've seen before include "'Rule over, control (6)'" , "Be in power" , "Check; rule" , "Rule or administer" , "Control, determine" .)
'rule' is the definition.
(I know that rule can be written as dominion)
This is all the clue.
(Other definitions for dominion that I've seen before include "territory" , "eg Canada" , "Sovereignty, control" , "Jurisdiction" , "Authority to rule over and control people" .)