volcano noun definition in Natural disasters topic from the Oxford Advanced Learner's Dictionary

volcano

 noun: Natural disasters topic
a mountain with a large opening at the top through which gases and lava (= hot liquid rock) are forced out into the air, or have been in the past An active volcano may erupt at any time. a dormant volcano (= one that is not active at present) an extinct volcano (= one that is no longer active) a volcano spewing red hot lava