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English definition of “earthquake”

earthquake

noun [C]     /ˈɜːθ.kweɪk/ US  /ˈɝːθ-/
B2 a sudden violent movement of the earth's surface, sometimes causing great damage: In 1906 an earthquake destroyed much of San Francisco.Earthquakes and volcanic eruptions
(Definition of earthquake noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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