thunderer n an epithet for Jupiter n a noisemaker that makes a sound like thunder Usage(s) Trud did not mention oil, but another Soviet thunderer did. John Knox, Scotland's 16th century thunderer against popery, would have preached himself hoarse at the thought. Beethoven the charmer, instead of Beethoven the thunderer, in a performance that misses none of his smiles and gestures. Synonym(s) Jupiter Tonans Thunderer