ig‧ni‧tion /ɪɡˈnɪʃən/ noun

1. [singular] the electrical part of a vehicle’s engine that makes it start working

2. [countable usually singular] the place in a car where you put in a key to start the engine

3. [uncountable] formal the act of starting to burn or of making something start to burn

[TahlilGaran] Dictionary of Contemporary English ▲

ignition
noun
VERB + IGNITION switch on, turn on She got into the car and switched on the ignition.
switch off, turn off
IGNITION + NOUN key He turned the ignition key.
PREP. in the ~ I must have left my key in the ignition.

[TahlilGaran] Collocations Dictionary ▲