A loud percussive sound, like thunder. A thunderstorm.

To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity; often used impersonally. To make a noise like thunder. To talk with a loud, threatening voice. To say (something) with a loud, threatening voice. To produce something with incredible power

Of, pertaining to, or accompanied by thunder. Producing a noise or effect like thunder; thunderous. Very great; extraordinary.