noun (n)

• a secret method of writing(noun.communication)

  Synonym:
  cipher, cypher, secret code
  

  source: wordnet30
• a piece of writing in code or cipher(noun.communication)

  Synonym:
  cryptogram, secret writing
  

  source: wordnet30
• a device for deciphering codes and ciphers(noun.artifact)

  source: wordnet30
• Cipher; something written in cipher.(noun)

  source: webster1913