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English definition of “code”

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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 areaCommunicating 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 code Morality and rules of behaviourPhilosophyRules and laws
(Definition of code from the Cambridge Learners Dictionary © Cambridge University Press)
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