In*cen"di*a*ry (?; 277), n.; pl. Incendiaries (#). [L. incendiarius: cf. F. incendiaire. See Incense to inflame.]

1. Any person who maliciously sets fire to a building or other valuable or other valuable property.

2. A person who excites or inflames factions, and promotes quarrels or sedition; an agitator; an exciter.

Several cities . . . drove them out as incendiaries.

In*cen"di*a*ry, a. [L. incendiarius, fr. incendium a fire, conflagration: cf. F. incendiaire. See Incense to inflame.]

1. Of or pertaining to incendiarism, or the malicious burning of valuable property; as, incendiary material; as incendiary crime.

2. Tending to excite or inflame factions, sedition, or quarrel; inflammatory; seditious. Paley.

• Capable of causing fire.
  
• Inflammatory, emotionally charged.
       Politics is an incendiary topic; it tends to cause fights to break out.
  
• Something capable of causing fire, particularly a weapon.
       The military used incendiaries to destroy the building, fortunately the fire didn't spread.