decodingmanual
nounUK /diːˈkəʊdɪŋ ˈmænjuəl/
US /diːˈkoʊdɪŋ ˈmænjuəl/
A book that tells you how to figure out secret codes.
The spy used a decoding manual to read the hidden message.
RELATED WORDS
OTHER MEANINGS
2. A set of instructions for understanding a special language or system.
The engineer checked the decoding manual to read the machine's error signals.
3. A guide that explains how to translate symbols into ordinary words.
She followed the decoding manual to turn the symbols into a sentence.
4. A reference book for solving encrypted puzzles.
The club kept a decoding manual for its weekly secret-code games.