Definition of ignition in English:


Line breaks: ig|ni¦tion
Pronunciation: /ɪɡˈnɪʃ(ə)n


[mass noun]
1The action of setting something on fire or starting to burn: three minutes after ignition, the flames were still growing
More example sentences
  • The danger is that the child s hand is still in the line of fire when ignition occurs and severe burns result.
  • The ESU is the most frequent ignition source for surgical fires.
  • The cast-iron grate can hold 18 burgers, and one-touch ignition makes lighting the fire a cinch.
1.1The process of starting the combustion of fuel in the cylinders of an internal-combustion engine: a small amount of diesel fuel must be injected to allow ignition
More example sentences
  • In the early 70's came electronic ignition and electronic fuel injection.
  • Other unusual engine features include valve timing control and direct fuel ignition.
  • At that speed, ignition and combustion take place in a matter of milliseconds.
1.2 [count noun] (usually the ignition) The mechanism for bringing about ignition in an internal-combustion engine, typically activated by a key or switch: she turned off the ignition
More example sentences
  • Buffy switched off the ignition and leaned forward, resting her forehead on the steering wheel.
  • Alice quickly followed her, closed the door, fumbled with the key before finally getting it into the ignition, switched in on, then took a few deep breaths.
  • He claimed he couldn't switch off the ignition because modern Renaults have a magnetic card ‘key’ system and he was unable to remove the card while on the run.


early 17th century (denoting the heating of a substance to the point of combustion or chemical change): from medieval Latin ignitio(n-), from the verb ignire 'set on fire' (see ignite).

Definition of ignition in: