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thunderbolt

[thuhn-der-bohlt] /ˈθʌn dərˌboʊlt/
noun
1.
a flash of lightning with the accompanying thunder.
2.
an imaginary bolt or dart conceived as the material destructive agent cast to earth in a flash of lightning:
the thunderbolts of Jove.
3.
something very destructive, terrible, severe, sudden, or startling.
4.
a person who acts with fury or with sudden and irresistible force.
Origin
late Middle English
1400-1450
1400-50; late Middle English thondre bolte. See thunder, bolt1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for thunderbolt
  • It is the flash which appears, the thunderbolt will follow.
  • He had escaped a thunderbolt, but he was still under a cloud.
British Dictionary definitions for thunderbolt

thunderbolt

/ˈθʌndəˌbəʊlt/
noun
1.
a flash of lightning accompanying thunder
2.
the imagined agency of destruction produced by a flash of lightning
3.
(in mythology) the destructive weapon wielded by several gods, esp the Greek god Zeus See also Thor
4.
something very startling
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for thunderbolt
n.

mid-15c., from thunder (n.) + bolt (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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