1 system of letters, numbers, etc. for secret information
ADJ. secret | Morse
VERB + CODE break, crack, decipher The code was difficult to crack. | use, write in | invent, make up
CODE + NOUN word
PREP. in ~ All the messages were in code.
2 numbers/letters for identifying sth
ADJ. area, dialling What's the area code for Bath? | post/postal | bar, charge | DNA, genetic | binary (= a system of computer programming instructions) | error (= on a computer)
CODE + NOUN number
3 set of rules for behaviour
ADJ. strict | ethical, moral | civil, criminal, disciplinary, penal | Highway the Highway Code (= the official rules for users of public roads in Britain) | dress
VERB + CODE have | devise, draw up, establish, formulate, lay down The company has drawn up a new disciplinary code. | comply with, follow | break, infringe, violate He was thrown out for infringing the club's strict dress code.
PHRASES a code of behaviour/conduct/ethics/honour/practice The profession has a strict code of practice.