Thunderbolts meaning : A flash of lightning accompanied by a crash of thunder. An event that is terrible, horrific or unexpected. Vehement threatening or censure; especially, ecclesiastical denunciation; fulmination. A very powerful shot. A belemnite, or thunderstone. A charge in the form of two joined bundles with four rays of lightning emerging from them, resembling the thunderbolt of Jupiter. A daring or irresistible hero.