|Origin:||vulcano, from Latin Vulcanus 'Vulcan'|
vol‧ca‧no plural volcanoes or volcanos [countable]
a mountain with a large hole at the top, through which lava (=very hot liquid rock) is sometimes forced out:
Pompeii was destroyed when the volcano erupted in 79AD.
active volcano (=one that may explode at any time)
dormant volcano (=one that is not active at the moment)
extinct volcano (=one that is no longer active at all)