code

Noun

• (n.) code, codification (a set of rules or principles or laws (especially written ones))
• (n.) code (a coding system used for transmitting messages requiring brevity or secrecy)
• (n.) code, computer code ((computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions)

Verb

• (v.) code (attach a code to) "Code the pieces with numbers so that you can identify them later"
• (v.) code, encipher, cipher, cypher, encrypt, inscribe, write in code (convert ordinary language into code) "We should encode the message for security reasons"