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English definition of “code”

code

noun     /kəʊd/
SECRET MESSAGE [C, U] B2 a set of letters , numbers , or signs that are used instead of ordinary words to keep a message secret : The message was written in code. They were trying to break (= understand ) the enemy's code.Codes and decodingSigns, signals and symbols
TELEPHONE [C] UK (UK/US area code) a set of numbers used at the beginning of all the telephone numbers in a particular area Communicating by telephone
RULES [C] a set of rules on how to behave or how to do things: a code of conduct / practice The club has a strict dress code (= rules about what you wear ). → See also bar code, zip codeMorality and rules of behaviourPhilosophyRules and laws
(Definition of code noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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