Definition of "ignite"

ignite

/ɪɡˈnaɪt/

verb
third-person singular simple present ignites, present participle igniting, simple past and past participle ignited
1. (transitive) to set fire to (something), to light (something)
2. (transitive) to spark off (something), to trigger
  Quotations
  Our observations on the way up had been mixed but the deep, crisp cold of the Peruvian night followed by a crystal clear dawn re-ignited our enthusiasm and sent us scampering across the frozen snow bowl […]
  2005, Mick Fowler, On Thin Ice: Alpine Climbs in the Americas, Asia and the Himalaya
3. (intransitive) to commence burning.
4. (chemistry, transitive) To subject to the action of intense heat; to heat strongly; often said of incombustible or infusible substances.