cipher

noun

1.
a message written in a secret code
cypher
Derived from:
cipher
Exemplifies:
American spelling
2.
a mathematical element that when added to another number yields the same number
0 cypher nought zero
Derived from:
cipher
Exemplifies:
American spelling
3.
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
aught cypher goose egg nada naught nil nix nothing null zero zilch zip zippo
Exemplifies:
American spelling
4.
a person of no influence
cypher nobody nonentity
Exemplifies:
American spelling
5.
a secret method of writing
cryptograph cypher secret code
Derived from:
cipher
Exemplifies:
American spelling