Incendiary \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. {Incendiary shell}, a bombshell. See {Carcass}, 4.