secretcode

noun
UK /ˈsiː.krət kəʊd/
US /ˈsiː.krət koʊd/

A secret code is a special set of signs or words that only certain people can understand.

The friends made a secret code so nobody else could read their notes.


OTHER MEANINGS

2. A hidden password used to open something, like a phone or a door.

He typed the secret code to unlock the treasure chest.

3. A way of writing that hides the real meaning of a message.

The detective solved the secret code in the letter.

4. A private set of rules shared by a group of friends.

Only club members knew the secret code for their meetings.