code · noun /kəʊd/
code (SECRET MESSAGE)
B2 C or U a system of words, letters or signs which is used to represent a message in secret form
Dictionary examples:
The message was written in code.
She managed to break/crack the code.
Learner example:
Everyone had already heard of me getting the secret access code for the 'Secret Society' organisation. (First Certificate in English; B2; Polish)
code (RULES)
C1 C a set of rules on how to behave or how to do things
Dictionary examples:
a code of conduct/practice
The club has a strict dress code.
Learner example:
Most of their manners, dress code, personal conduct and their general well-being is taught at school. (International English Language Testing System; C1; Afrikaans)