flam·ma·ble I. \ˈflaməbəl\adjective Etymology: Latin flammare to flame, set on fire + English -able — more at flame : capable of being easily ignited and of burning with extreme rapidity — now used technically in preference to inflammable; compare combustible, explosive < cannot be used for safety reasons in coal mines in which flammable gases are present — A.C.Morrison > II. noun (-s) : a flammable substance