codenumbers

noun
UK /ˈkəʊdˌnʌmbəz/
US /ˈkoʊdˌnʌmbərz/

Secret numbers used to keep information safe or to name things in a hidden way.

The spies wrote the codenumbers on a tiny piece of paper.


OTHER MEANINGS

2. Numbers used as labels in a computer program or system.

Each product in the store has its own codenumbers in the computer.

3. Numbers that stand for words or names in a secret message.

The puzzle used codenumbers to hide the answer.

4. Numbers assigned to identify something in a coded list.

The museum keeps codenumbers for every painting.