Meaning

• A short symbol, often with little relation to the item it represents.

  "This flavour of soup has been assigned the code WRT-9."

• A body of law, sanctioned by legislation, in which the rules of law to be specifically applied by the courts are set forth in systematic form; a compilation of laws by public authority; a digest.

• Any system of principles, rules or regulations relating to one subject.

  "The medical code is a system of rules for the regulation of the professional conduct of physicians."

• A set of rules for converting information into another form or representation.

• A message represented by rules intended to conceal its meaning.

• A cryptographic system using a codebook that converts words or phrases into codewords.

• Instructions for a computer, written in a programming language; the input of a translator, an interpreter or a browser, namely: source code, machine code, bytecode.

  "I wrote some code to reformat text documents."

• (scientific programming) A program.

• A particular lect or language variety.

• An emergency requiring situation-trained members of the staff.

Meaning

• To write software programs.

  "I learned to code on an early home computer in the 1980s."

• To add codes to a dataset.

• To categorise by assigning identifiers from a schedule, for example CPT coding for medical insurance purposes.

• To encode.

  "We should code the messages we send out on Usenet."

• To encode a protein.

• To call a hospital emergency code.

  "coding in the CT scanner"