Definition of "volcano" in English

noun

1. 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.

   • Iceland's volcanoes are among the most active on Earth.

2. A kind of firework producing an upward plume of sparks.

verb

1. to erupt; to burst forth