An incendiary device is a bomb. An incendiary statement is, "You're ugly and stupid." Both are likely to produce an explosion of one kind or another.

Incendiary means more than flammable. It means explosive, in both a literal and figurative way. If you're a radical who changes the world by exciting people and makes as many enemies as followers, you're an incendiary figure. The speeches you give that rile people up are incendiary. The fires you set are also incendiary, and by setting them you are also likely to be called an incendiary — someone who burns things, more commonly known as an arsonist.

Definitions of incendiary

adj capable of catching fire spontaneously or causing fires or burning readily

“an incendiary agent”
incendiary bombs”
capable of igniting and burning

adj involving deliberate burning of property

“an incendiary fire”

adj arousing to action or rebellion

incitive, inflammatory, instigative, rabble-rousing, seditious
serving or tending to provoke, excite, or stimulate; stimulating discussion or exciting controversy

n a criminal who illegally sets fire to property

arsonist, firebug
someone who burns down a barn
Type of:
criminal, crook, felon, malefactor, outlaw
someone who has committed a crime or has been legally convicted of a crime

n a bomb that is designed to start fires; is most effective against flammable targets (such as fuel)

firebomb, incendiary bomb
Type of:
an explosive device fused to explode under specific conditions

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