noun

1. A numeric character.

2. Any text character.

3. A combination or interweaving of letters, as the initials of a name; a device; a monogram.

   “a painter's cipher, an engraver's cipher, etc.”

Synonyms: monogram, code, number, numeral, naught, nothing, nought, oh

verb

1. To calculate.

   “I never learned much more than how to read and cipher.”

2. To write in code or cipher.

3. Of an organ pipe: to sound independent of the organ.