Definition of incendiary

• n. - Any person who maliciously sets fire to a building or other valuable or other valuable property.
• n. - A person who excites or inflames factions, and promotes quarrels or sedition; an agitator; an exciter.
• a. - Of or pertaining to incendiarism, or the malicious burning of valuable property; as, incendiary material; as incendiary crime.
• a. - Tending to excite or inflame factions, sedition, or quarrel; inflammatory; seditious.