A small hole through which the propellant charge of a cannon or muzzleloading gun is ignited.
A kind of firework producing an upward plume of sparks.
A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.
to erupt; to burst forth