(countable, uncountable) A short textual designation, often with little relation to the item it represents.
(countable, uncountable) 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.
(countable, uncountable) Any system of principles, rules or regulations relating to one subject.
(countable, uncountable) A set of rules for converting information into another form or representation.
(countable, uncountable) A set of rules for converting information into another form or representation.
(countable, uncountable) A message represented by rules intended to conceal its meaning.
(countable, uncountable) A cryptographic system using a codebook that converts words or phrases into codewords.
(uncountable) 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.
(countable, uncountable) A program.
(countable, uncountable) A particular lect or language variety.
(countable, uncountable) An emergency requiring situation-trained members of the staff.
(countable, informal, uncountable) A set of unwritten rules that bind a social group.

To write software programs.
(transitive) To add codes to (a data set).
To categorise by assigning identifiers from a schedule, for example CPT coding for medical insurance purposes.
To encode.
(intransitive) To encode a protein.
To call a hospital emergency code.

Of a patient, to suffer a sudden medical emergency (a code blue) such as cardiac arrest.

codes

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