noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An unexplained phenomenon that sounds like a thunderclap, cannon storm earthquake volcano or sonic boom coming from the sky, with no observable cause, heard in various countries around the world.

Etymology

From sky + quake.

Related phrases

sonic boom

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.