volcano volcano /vɑːlˈkeɪnoʊ/

noun

1. () A fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt  ( vent , volcano )
   a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
    The volcanic vent spewed ash and lava into the air
   The volcanic vent spewed ash and lava into the air
   
   
2. A mountain formed by volcanic material  ( volcano )
   a mountain formed by volcanic material
    The volcano erupted after decades of dormancy.
   The volcano erupted after decades of dormancy.