code book
Americannoun
Etymology
Origin of code book
First recorded in 1880–85
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Frantically, Jonah angled the mirror, turning his tax code book almost sideways.
From Literature
![]()
They believed that these numbers could be related to a Chinese code book.
From Literature
![]()
Simple codes like this are easy to remember, but anything complicated will need a code book, which can be hard to lug around.
From Literature
![]()
For example, if the word “attic” isn’t in your code book, you can’t say, “Hide the money in the attic.”
From Literature
![]()
But it seemed like maybe Mom had given Emma the first code book; it seemed like Mom might have said something like, “Sometimes kids who like math also like codes.”
From Literature
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.