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English definition of “volcano”

volcano

noun [C] uk   /vɒlˈkeɪ.nəʊ/ us    /vɑːlˈkeɪ.noʊ/ (plural volcanoes or volcanos)
B2 a mountain with a large, circular hole at the top through which lava (= hot liquid rock) gases, steam, and dust are or have been forced out: an extinct/dormant volcano an active volcano Erupting volcanoes discharge massive quantities of dust into the stratosphere.
volcanic
adjective uk   /-ˈkæn.ɪk/ us  
volcanic ash/activity/rock
(Definition of volcano from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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