'Thunderclap' definitions:

Definition of 'thunderclap'

From: WordNet
noun
A single sharp crash of thunder
noun
A shocking surprise; "news of the attack came like a bombshell" [syn: bombshell, thunderbolt, thunderclap]

Definition of 'Thunderclap'

From: GCIDE
  • Thunderclap \Thun"der*clap`\, n. A sharp burst of thunder; a sudden report of a discharge of atmospheric electricity. "Thunderclaps that make them quake." --Spenser. [1913 Webster]
  • When suddenly the thunderclap was heard. --Dryden. [1913 Webster]