rule - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “rule”

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rule

noun  us   /rul/

rule noun (INSTRUCTION)

[C] an accepted principle or instruction that states the way things are or should be done, and tells you what you are allowed or are not allowed to do: The company's chief executive failed to enforce federal workplace rules. If you broke the rule, you’re going to be punished for it. It's against the rules to kick someone.

rule noun (CONTROL)

[U] control: This area was under Polish rule until the start of World War II.

rule

verb [I/T]  us   /rul/

rule verb [I/T] (DECIDE)

to decide officially: [I] A lower court ruled in favor of the society. [+ that clause] The judge ruled that the defendant be taken back to Virginia.

rule verb [I/T] (CONTROL)

politics & government to control, or be the person in charge of a country: [I] The prince ruled wisely and well.
Phrasal verbs
(Definition of rule from the Cambridge Academic Content Dictionary © Cambridge University Press)
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