Something capable of causing fire, particularly a weapon.
The military used incendiaries to destroy the building. Fortunately, the fire didn't spread.
One who maliciously sets fires.
One who excites or inflames factions into quarrels.
Capable of, or used for, or actually causing fire.
Intentionally stirring up strife, riot, rebellion.
Inflammatory, emotionally charged.
Politics is an incendiary topic; it tends to cause fights to break out.