<p><strong>Noun:</strong></p><ul><li>a state, process, or instance of combustion in which fuel or other material is ignited and combined with oxygen, giving off light, heat, and flame.</li><li>a burning mass of material, as on a hearth or in a furnace.</li><li>the destructive burning of a building, town, forest, etc.; conflagration.</li><li>heat used for cooking, especially the lighted burner of a stove: Put the kettle on the fire.</li><li>a sharp, pungent flavor, as that produced by strong spices.</li><li>burning passion; excitement or enthusiasm; ardor.</li><li>severe trial or trouble; ordeal.</li><li>a single intense effort; a sustained, concentrated, and continuous operation.</li><li>slang: a pistol, revolver, or other firearm.</li></ul><p><strong>Verb:</strong></p><ul><li>to set on fire.</li><li>to supply with fuel or attend to the fire of (often followed by up): They fired the boiler.</li><li>to expose to the action of fire; subject to heat.</li><li>to discharge (a gun).</li><li>to shoot, as a gun.</li></ul><p><strong>Adjective:</strong></p><ul><li>slang: cool, excellent, exciting, etc.: It would be so fire if we won those tickets!</li></ul>