a system of words, letters, figures, or symbols used to represent others, especially for the purposes of secrecy

the Americans cracked their diplomatic code

messages written in code

program instructions

assembly code

a systematic collection of laws or statutes

a revision of the penal code

convert (the words of a message) into a code so as to convey a secret meaning

only Mitch knew how to read the message—even the name was coded

write code for (a computer program)

most developers code C + + like C

I no longer actively code in PHP

be the genetic code for (an amino acid or protein)

genes that code for human growth hormone