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English definition of “rule”

rule

noun [C] (INSTRUCTION)   /rul/
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.
(Definition of rule noun (INSTRUCTION) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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