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someone's word is law
Definition of someone's word is law
—used to say that other people must do what someone says He'll listen to suggestions, but in the end, his word is law.
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Word by Word Definitions
wordplay
: something that is said
: talk, discourse
: the text of a vocal musical composition
: speak
: to express in words : phrase
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lawplay
: a binding custom or practice of a community : a rule of conduct or action prescribed (see prescribe 1a) or formally recognized as binding or enforced by a controlling authority
: the whole body of such customs, practices, or rules
: common law
: litigate
: to sue or prosecute at law
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