<p><strong>Noun</strong></p><ul><li>Any large fire in brush, forests, or open spaces that spreads rapidly and is hard to extinguish.</li><li>A highly flammable composition, such as Greek fire, difficult to extinguish when ignited, formerly used in warfare.</li><li>Sheet lightning, unaccompanied by thunder.</li><li>The ignis fatuus or a similar light.</li><li>Plant Pathology: A disease of tobacco and soybeans, characterized by brown, necrotic spots, each surrounded by a yellow band, on the leaves and caused by the bacterium <em>Pseudomonas tabaci</em>.</li><li>Pathology Obsolete: Erysipelas or some similar disease.</li></ul>