codednumber

noun
UK /ˈkəʊdɪd ˈnʌmbə/
US /ˈkoʊdɪd ˈnʌmbər/

A coded number is a number that stands for something secret or special.

The spy wrote a coded number on the paper so no one else could read it.


OTHER MEANINGS

2. A number used as an identifier in a computer system.

Each student gets a coded number to log in to the school computer.

3. A number that has been changed into a secret form using a rule.

The message used a coded number to hide the real price.

4. A number printed on a product to show what it is.

The coded number on the box tells the shop which toy is inside.