: a person who has an uncontrollable impulse to start fires : a person affected by pyromania
A psychological assessment commissioned by the defence came to the conclusion that Schalm was not a pyromaniac, nor was he bipolar, making the risk of recidivism minimal. Jeremy Appel
—sometimes used in an exaggerated or joking way to refer to a person who enjoys fires
The self-described pyromaniac said she is excited about the pellet fire pits that will frame the front entrance. Sarah Self-Walbrick
… his earliest pyromaniacal urges … seem to have developed in 1862 … Sherman ordered the torching of all towns, villages, farms and homes for 15 miles up and down the river. Winston Groom