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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This would fundamentally rewrite the WTO rule book. Inu Manak, Time, 27 May 2026 Starting lineup for Sunday’s Cup Series race Cup qualifying was washed out Saturday afternoon, and thus the starting lineup was set by the rule book. Scott Fowler, Charlotte Observer, 24 May 2026 That said, there’s no rule book for graduation. Bestreviews, Chicago Tribune, 4 May 2026 The European Union Aviation Safety Agency (EASA), whose eVTOL rules the CAA has adopted, built a single new rule book. Deni Ellis Béchard, Scientific American, 25 Apr. 2026 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 6 Jun. 2026.

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