What does lock mean?

[SanRebecca]

LOCK refers to the lock position, which is also where the key is inserted and removed. The related gear positions are introduced as follows: Introduction to car gear positions: There are four positions on the car's keyhole, namely the LOCK position, ACC position, ON position, and START position. ACC position: The ACC position is the accessory power-on position. When the key is turned to this position, the accessory circuit will be activated. ON position: The ON position is the power-on position. When the key is in this position, the entire vehicle's circuit will be activated, and the system will begin necessary preparation and self-checking work. Moreover, the key remains in this position during normal vehicle operation. START position: The START position refers to the start position. When the key is turned to this position, the starter circuit is activated, which drives the engine to operate and start.