| Noun | 1. | coding system - a system of signals used to represent letters or numbers in transmitting messages code - a coding system used for transmitting messages requiring brevity or secrecy computer code, code - (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions writing - letters or symbols that are written or imprinted on a surface to represent the sounds or words of a language; "he turned the paper over so the writing wouldn't show"; "the doctor's writing was illegible" |