Definitions from Wiktionary ( )

▸ noun:  A numeric character.
▸ noun:  Any text character.
▸ noun:  A combination or interweaving of letters, as the initials of a name.
▸ noun:  A method of transforming a text in order to conceal its meaning.
▸ noun:  (cryptography) A cryptographic system using an algorithm that converts letters or sequences of bits into ciphertext.
▸ noun:  Ciphertext; a message concealed via a cipher.
▸ noun:  A grouping of three digits in a number, especially when delimited by commas or periods:
▸ noun:  (music) A fault in an organ valve which causes a pipe to sound continuously without the key having been pressed.
▸ noun:  (music, slang) A hip-hop jam session.
▸ noun:  (slang) The path (usually circular) shared cannabis takes through a group, an occasion of cannabis smoking.
▸ noun:  Someone or something of no importance.
▸ noun:  (dated) Zero.
▸ noun:  Eggcorn of siphon.
▸ verb:  (intransitive, regional, dated) To calculate.
▸ verb:  (intransitive) To write in code or cipher.
▸ verb:  (intransitive, music) Of an organ pipe: to sound independent of the organ.
▸ verb:  (obsolete) To decipher.

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