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English definition of “seismic”

seismic

adjective     /ˈsaɪz.mɪk/
[before noun] specialized geology relating to or caused by an earthquake: seismic activity/wavesEarthquakes and volcanic eruptions having very great and damaging effects: The news that the chairman would resign set off seismic waves in the business community.Damaging and spoilingDestroying and demolishing
(Definition of seismic adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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