Definition of “lay down the law” - English Dictionary

british dictionary

“lay down the law” in British English

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lay down the law

informal

to forcefully make known what you think should happen:

She can't just come into this office and start laying down the law.

(Definition of “lay down the law” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“lay down the law” in American English

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lay down the law

to tell people what they must do, without caring about their opinions:

Some parents talk things through with their kids instead of simply laying down the law.

(Definition of “lay down the law” from the Cambridge Academic Content Dictionary © Cambridge University Press)