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English definition of “thunderbolt”

thunderbolt

noun [S] (SURPRISE/SHOCK)    /ˈθʌn.də.bəʊlt/ US  /-dɚ.boʊlt/
an announcement, event, or idea that is completely unexpected or shocking: He dropped a thunderbolt on us this morning, when he told us that we were closing down.Surprising and shockingMaking people sad, shocked and upset
(Definition of thunderbolt noun (SURPRISE/SHOCK) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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