a system of words, letters, or signs that are used for sending secret messages or for opening or unlocking things
What’s the code for opening the safe?
The spy used a secret code to communicate with headquarters, ensuring the safety of classified information.
The access code to the vault was a carefully guarded secret known only to a select few.
In the escape room, deciphering the code was the key to unlocking the next set of challenges.
The detective found a coded message at the crime scene, initiating a complex investigation to unveil its meaning.
