n. A composition of inflammable materials readily catching fire and hard to be extinguished; Greek fire: often used figuratively.n. Sheet-lightning; a kind of lightning unaccompanied by thunder.n. The blue flames of alcohol burnt in some dishes when brought on table, as with plum-pudding.n. In coal-mining, the name formerly sometimes given by miners to fire-damp.n. Erysipelas; also, lichen circumseriptus, an eruptive disease, consisting of clusters or patches of papulæ.n. A disease of sheep, attended with inflammation of the skin.