n. | 1. | (Geol.) A mountain or hill, usually more or less conical in form, from which lava, cinders, steam, sulphur gases, and the like, are ejected; - often popularly called a |
Noun | 1. | volcano - a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt Synonyms: vent |
2. | volcano - a mountain formed by volcanic material |