What does the word thunderclap mean?

Usage examples for thunderclap

  1. But nothing happened till weeks later, when the tragedy on the Rapidan fell on us like a thunderclap. – Salute to Adventurers by John Buchan
  2. You may easily guess what a thunderclap this must have been to the Court. – The Memoirs of Cardinal de Retz, Complete by Jean Francois Paul de Gondi, Cardinal de Retz
  3. It was a thunderclap with a vengeance! – A Dog with a Bad Name by Talbot Baines Reed
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