ignition
🇺🇸
/ɪɡˈnɪʃn/
🇬🇧
/ɪɡˈnɪʃn/
the part of a car that starts the engine when you turn the key
Turn the key in the ignition to start the car.
the act of starting to burn or making something burn
The ignition of the gas caused a big fire.