ignition
noun uk/ɪɡˈnɪʃ.ən/ us/ɪɡˈnɪʃ.ən/
[ C usually singular ]点火装置，点火器
the electrical system in an engine that causes the fuel to burn or explode in order to start the engine
Switch/Turn the ignition on. 打开点火开关。
an ignition key 点火开关
[ U ] formal着火，燃烧
the act or process of something starting to burn