Definitions
1.nounSomething capable of causing fire, particularly a weapon."The military used incendiaries to destroy the building. Fortunately, the fire didn't spread."
2.nounOne who maliciously sets fires.
3.nounOne who excites or inflames factions into quarrels.
4.adjectiveCapable of, or used for, or actually causing fire.
5.adjectiveIntentionally stirring up strife, riot, rebellion.
6.adjectiveInflammatory, emotionally charged."Politics is an incendiary topic; it tends to cause fights to break out."