Noun:
1: codification, code a set of rules or principles or laws (especially written ones)
2: code a coding system used for transmitting messages requiring brevity or secrecy
3: computer code, code (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions
Verb:
1: code attach a code to; "Code the pieces with numbers so that you can identify them later"
2: encrypt, cypher, inscribe, encode, write in code, cipher, encipher, code convert ordinary language into code; "We should encode the message for security reasons"