rule book

noun

: a book that contains the official set of rules that must be followed in a game, job, etc.
always carries the rule book in his back pocket to every game
also : the rules in such a book
The rule book says that once the puck fully crosses the line it is a goal.
often used figuratively
He's a maverick when it comes to decorating, throwing away the rule book.

Examples of rule book in a Sentence

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From ‘first attraction’ in giant-nosed proboscis monkeys to the importance of wingmen in turkey courtship to foreplay in flying foxes, these guys have re-written the rule book on messy and complicated relationships. Tony Maglio, HollywoodReporter, 27 May 2025 Citing canon law and the rule book of the Augustinians, Father Prevost lists offenses that might lead someone to be dismissed from the order. Ruth Graham, New York Times, 22 May 2025 The Little Rock Kickball Association's rule book, which started out at eight pages, now is 40 pages long. Sean Clancy, Arkansas Online, 11 May 2025 Trump’s world order Mr. Orban’s defiant welcome of Mr. Netanyahu has highlighted one way the world has changed since Mr. Trump came to power: By throwing out the global rule book on longstanding alliances and trade rules, the American president has given permission to others to break the rules too. Katrin Bennhold, New York Times, 8 Apr. 2025 See All Example Sentences for rule book

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Cite this Entry

“Rule book.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rule%20book. Accessed 3 Jun. 2025.

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