What is the meaning of ignite?

verb

• Cause to start burning; subject to fire or great heat.
  • usage: "Great heat can ignite almost any dry matter"; "Light a cigarette"
  • synonyms: light
• Start to burn or burst into flames.
  • usage: "Marsh gases ignited suddenly"; "The oily rags combusted spontaneously"
  • synonyms: erupt, catch fire, take fire, combust, conflagrate
• Arouse or excite feelings and passions.
  • usage: "The ostentatious way of living of the rich ignites the hatred of the poor"; "The refugees' fate stirred up compassion around the world"; "Wake old feelings of hatred"
  • synonyms: inflame, stir up, wake, heat, fire up