1. The sound which follows a flash of lightning; the report of a discharge of atmospheric electricity. 2. The discharge of electricity; a thunderbolt. [Obs.] The revenging gods 'Gainst parricides did all their thunders bend. Shak. 3. Any loud noise; as, the thunder of cannon. 4. An alarming or statrling threat or denunciation. The thunders of the Vatican could no l...