code·​book | \ ˈkōd-ˌbu̇k How to pronounce codebook (audio) \

Definition of codebook

: a book containing an alphabetical list of words or expressions with their code equivalents

Examples of codebook in a Sentence

Recent Examples on the Web Cracking the code Settings that programmed the rotors to substitute new letters changed every 24 hours; each unit had a codebook of daily settings, issued in advance. Kiona N. Smith, Ars Technica, 27 Dec. 2020 The error involved the NKVD’s codebooks, known as one-time pads, which used random numbers to scramble letters, words and phrases. Tim Folger, Discover Magazine, 17 Aug. 2018 White privilege is like an invisible weightless backpack of special provisions, maps, passports, codebooks, visas, clothes, tools and blank checks. Michael Harriot, The Root, 7 June 2018 Another interesting featurette documents the creation of the pirate codebook, a ridiculously detailed (and extremely heavy) prop. Lewis Wallace, WIRED, 4 Dec. 2007

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'codebook.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of codebook

1866, in the meaning defined above

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Time Traveler for codebook

Time Traveler

The first known use of codebook was in 1866

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Cite this Entry

“Codebook.” Dictionary, Merriam-Webster, Accessed 13 Jun. 2021.

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