seismic Meaning in the Cambridge English Dictionary
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Meaning of “seismic” in the English Dictionary

"seismic" in British English

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seismicadjective

uk   us   /ˈsaɪz.mɪk/
[before noun] specialized geology relating to or ​caused by an earthquake: seismic ​activity/​waves having very ​great and ​damagingeffects: The ​news that the ​chairman would ​resign set off seismic ​waves in the ​businesscommunity.
(Definition of seismic from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"seismic" in American English

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seismicadjective [not gradable]

 us   /ˈsɑɪz·mɪk/
earth science relating to, or caused by an earthquake (= ​suddenviolentmovement of the earth’s ​surface)
(Definition of seismic from the Cambridge Academic Content Dictionary © Cambridge University Press)
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