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English definition of “code”

code

noun [C or U] (LANGUAGE)    /kəʊd/ US  /koʊd/
B2 a system of words, letters, or signs used to represent a message in secret form, or a system of numbers, letters, or signals used to represent something in a shorter or more convenient form: The message was written in code. She managed to decipher/break/crack (= succeed in understanding) the code. Each entry in this dictionary has a grammar code.Codes and decodingSigns, signals and symbols
(Definition of code noun (LANGUAGE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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