Rulebook

//ˌɹulˌbʊk// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A book containing a set of rules.

    "In our rapidly changing business environment, rulebooks swiftly become redundant, and businesses must rely on their senior executives to be confident in their decisions."

Example

More examples

"In our rapidly changing business environment, rulebooks swiftly become redundant, and businesses must rely on their senior executives to be confident in their decisions."

Etymology

From rule + book.

Related phrases

throw rulebook

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.