ignition
nounUK /ɪɡˈnɪʃ.ən/
US /ɪɡˈnɪʃ.ən/
The act of making something start to burn or the part that starts a car's engine.
He turned the key in the ignition and the car started right away.
OTHER MEANINGS
2. The system in a vehicle that starts the engine.
The mechanic checked the ignition to see why the car wouldn't start.
3. The process of a fuel mixture catching fire inside an engine.
The engine's ignition happens many times per second while driving.
4. A chemical or physical process that causes a substance to begin burning.
The scientists studied the ignition of the fuel under high pressure.
5. The act of setting something in motion or starting a process.
The speech was the ignition of a nationwide movement.