Definition: Cypher

According to Dictionary.com

Cypher:

1. The mathematical symbol (0) denoting absence of quantity; zero.
2. An Arabic numeral or figure; a number.
3. One having no influence or value; a nonentity.
4. 1. A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.
   2. The key to such a system.
   3. A message written or transmitted in such a system.
5. A design combining or interweaving letters or initials; a monogram
6. A secret method of writing.
7. A message written in secret code.

Seriously I never find our definition of cypher on anybody's list.
Just a thought. (although a message written in secret seems to fit pretty well)