ciphers >> /ˈsʌɪfə/
Definition: [verb] Put (a message) into secret writing; encode.
Example: he left two, as yet uncracked, ciphered messages for posthumous decoding
Definition: [verb] Do arithmetic.
Definition: [noun] A secret or disguised way of writing; a code.
Example: he wrote cryptic notes in a cipher
Definition: [noun] A zero; a figure 0.
Definition: [noun] A monogram.
Example: a pair of rock crystal goblets engraved with the cipher of Peter the Great