primarycode
nounUK /ˈpraɪməri kəʊd/
US /ˈpraɪmeri koʊd/
A primary code is the main secret set of letters or numbers used to open or unlock something.
She typed the primary code into the keypad to open the door.
OTHER MEANINGS
2. The first or most basic set of symbols used in a computer program.
The programmer fixed the primary code before adding new features.
3. The main set of rules or signals used to identify something.
Each product has a primary code printed on its label.
4. The leading secret word used to start a game or device.
Enter the primary code to begin the game.