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blue book

1 ENTRIES FOUND:
blue book noun
plural blue books
blue book
noun
plural blue books
Britannica Dictionary definition of BLUE BOOK
[singular] : a report that is published by the government
[count] US : a thin booklet with a blue cover and empty pages that is often used for writing the answers to test questions in college
[singular] US : a book that lists the current value of items (such as used cars)