Definitions:

1. a mathematical element that when added to another number yields the same number noun
   • Zero is an example of a cipher.
2. a message written in a secret code noun
   • I could not decode the cipher that was sent to me.
3. a person of no influence noun
   • At work, I'm just a cipher.
4. a secret method of writing noun
   • I taught my allies the cipher.
5. to convert ordinary language into code verb
   • I ciphered the message so my enemies could not read my plans.
6. to make a mathematical calculation or computation verb
   • I ciphered the result quite easily.

Synonyms:

• code
• cryptograph
• encipher
• encrypt
• figure
• inscribe
• nobody
• nonentity
• nothing
• write in code
• zero