#1 ignite v. [light] cause to start burning; subject to fire or great heat; "Great heat can ignite almost any dry matter"; "Light a cigarette". wn
#2 ignite v. [erupt, catch fire, take fire, combust, conflagrate] start to burn or burst into flames; "Marsh gases ignited suddenly"; "The oily rags combusted spontaneously". wn
#3 ignite v. [inflame, stir up, wake, heat, fire up] arouse or excite feelings and passions; "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". wn
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