0 a set of letters, numbers, or signs that are used instead of ordinary words to keep a message secret -- clave
It was written in code.
1 a set of numbers used at the beginning of a phone number for a particular area -- prefijo
2 to represent a message in code so that it can only be understood by the person who is meant to receive it -- cifrar, poner en clave
3 a system for communicating using secret combinations of symbols -- código [ masculine ]
a message written in code un mensaje escrito en código
4 a set of rules for behavior -- código [ masculine ]
a code of conduct un código de conducta
5 a series of numbers that identifies or allows sth -- código [ masculine ]
the code that turns off the alarm el código que apaga la alarma
