What does 'lock' mean on a car?

[DelCarmen]

Car dashboard displaying 'lock' refers to the ignition switch. The four positions of the car ignition switch system are as follows: 1. START: Position for starting the ignition; 2. ON: Powers all electrical components in the car, this is the position during vehicle operation; 3. ACC: Allows activation of some electrical components, such as the radio; 4. LOCK: Function to lock the steering wheel. Activation method: After inserting the key into the ignition switch, briefly pause at each position for about 1-2 seconds. At this time, you can hear the sound of electrical devices powering on, then proceed to the next position.