THUN'DERBOLT, noun [thunder and bolt.] 1. A shaft of lightning; a brilliant stream of the electrical fluid, passing from one part of the heavens to another, and particularly from the clouds to the earth. Psalms 78:48. 2. Figuratively, a daring or irresistible hero; as the Scipios, those thunderbolts of war. 3. Fulmination; ecclesiastical denunciation. He severely threatens such with the thunderbolt of excommunication. 4. In mineralogy, thunder-stone.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI