Meaning of “ignition” - Learner’s Dictionary

ignition

noun uk us /ɪɡˈnɪʃən/
CAR [ no plural ]

the part of a car that starts the engine:

He turned the key in the ignition.
BURN [ U ] formal

the process of making something start to burn or of starting to burn

(Definition of “ignition” from the Cambridge Learner’s Dictionary © Cambridge University Press)