A flash of lightning accompanied by a crash of thunder. / (figuratively) An event that is terrible, horrific or unexpected.

plural of thunderbolt

(computing, trademark) a computer interface standard for connecting devices, combining PCI Express, DisplayPort and DC power in one connector.

A long-horned beetle (Sarosesthes fulminans) whose larva bores in the trunks of oak and chestnut trees.

plural of thunderbolt beetle

(computing) An electronics chassis, physically external to a host system, that provides a way to connect PCI Express cards to that host using the Thunderbolt interface.