What does 'start' mean in a car?

[AlexisFitz]

The 'start' position in a car refers to the ignition key's starting position, which has a reset function. When the key switch is turned to the start position, it controls the starter relay to engage, allowing the starter motor to rotate the engine crankshaft, thereby starting the engine. The car key has four positions: OFF, ACC, ON, and the start position. The OFF position turns the car off; the ACC position powers some electrical components without starting the engine; the ON position powers all electrical components; the start position is a self-resetting switch that automatically returns to the ON position after the engine starts, which is the position for all electrical systems to be on, the position before ignition, and the position of the key while driving.