From Italian vulcano, from Latin Vulcānus.

• (RP) IPA: /vɒl.ˈkeɪ.nəʊ/, /vɒl.ˈkɑː.nəʊ/
• (America) IPA: /vɑl.ˈkeɪ.noʊ/, /vɔl.ˈkeɪ.noʊ/

volcano (plural volcanos or volcanoes)

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.

• French: volcan
• German: Vulkan, (poetic) Feuerberg, feuerspeiender Berg
• Italian: vulcano
• Portuguese: vulcão
• Russian: вулка́н
• Spanish: volcán

volcano (volcanos, present participle volcanoing; simple past and past participle volcanoed)

1. to erupt; to burst forth
   • 1951, Phyllis Hambledon, Nobody's Child:

     She shrank back, the words volcanoed, words that stabbed again, and yet again

   • 2012, George Pratt, Peter Lambrou, John David Mann, Code to Joy: The Four-Step Solution to Unlocking Your Natural State of Happiness:

     Startled, you look up at the horizon just in time to see a gigantic plume of ash and dust volcanoing up into the sky and spreading out to form a gigantic cloud that will persist for days, weeks, perhaps years.

1. CDP in Amador County, California.