What is the meaning of Thunderbolt?

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.

To strike with a thunderbolt.

To move swiftly and violently.

Source: wiktionary.org