WordNet
n. switch that operates a solenoid that closes a circuit to operate the starter
Wikipedia
An Ignition (or starter) switch is a switch in the control system of an internal combustion engined motor vehicle that activates the main electrical systems for the vehicle. Besides providing power to the starter solenoid and the ignition system components (including the engine control unit and ignition coil) it also usually switches on power to many "accessories" (radio, power windows, etc.). The ignition switch usually requires a key be inserted that works a lock built into the switch mechanism. It is frequently combined with the starter switch which activates the starter motor. The ignition locking system may be bypassed by disconnecting the wiring to the switch and manipulating it directly; this is known as hotwiring.
Usage examples of "ignition switch".
Jackson turned the ignition switch and the big out board coughed into deep, rumbling life.
I edged my left hand down the side of my seat until I found the wires that connected to the ignition switch of that outboard port motor.
There wasn't anything we could do for the two men because they'd been inside when the thing had gone off, triggered by the ignition switch or a rocker mechanism or something like that.
It's not a matter of Striker, shepherdess, Wagner, cheese-wire, Benedikt, ignition switch plus several million other images and their significance.
He had gone only fifty steps when he hurried back to the car to extract a solemn promise from Noisy that he would not install a jumper wire across the ignition switch to get the motor started.
Then he held the primer switch on for three seconds, turned the ignition switch to BOTH, and fired the starter cartridge.
Even as he spoke, Stromp closed the throttle, flicked off the ignition switch, and feathered the propeller.
Tearing open the door, he looked uncomprehendingly at the ignition switch.
Fumbling in the gloom his fingers found the throttle linkage and the ignition switch.