What does thunderbolt mean?
Thunderbolt most commonly denotes a bolt of lightning, particularly one occurring during a storm and followed by thunder. Because lightning and thunder are closely associated, the word often evokes the entire violent moment of a storm, even though it refers specifically to the lightning rather than the sound. In figurative use, a thunderbolt is a sudden shock or startling development, such as an unexpected election result, a major announcement, or the arrival of an exceptionally impressive person. The word can also describe a forceful impact or attack. In heraldry and other emblematic contexts, a thunderbolt is a stylized lightning bolt, historically associated with divine or superhuman power. Across these uses, thunderbolt consistently conveys immediacy, dramatic force, and surprise, making it especially effective for events that strike quickly and powerfully.
nounA thunderbolt is a discharge of lightning, especially one accompanied by thunder. Figuratively, it means a sudden shocking event or a forceful, startling impact.
- A bolt or stroke of lightning, especially one accompanied by thunder.
- A sudden, forceful shock or startling development, as with surprising news or an impressive arrival.
- In heraldry, a stylized lightning bolt used as an emblematic charge.
"A thunderbolt struck the old oak and split it in two."
"The thunderbolt brought down a power line and plunged the street into darkness."
"The election result was a thunderbolt, astonishing even the campaign's supporters."
The plural is used when referring to multiple lightning strikes, shocks, attacks, or other instances.
"Several thunderbolts illuminated the horizon during the storm."
One word compresses an entire storm into a flash, a bang, and the shock that follows.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does thunderbolt come from?
The word was formed in Old English as þunorbolt, a compound of þunor, meaning “thunder,” and bolt, meaning “a bolt of lightning”; bolt had also referred to a crossbow projectile. The compound continued in Middle English in both literal and figurative senses before developing into the modern form thunderbolt. Words including thunder, thunderous, and thunderstorm preserve the same English root represented by þunor.
Related word forms
How thunderbolt is actually used
The word is neutral in register when used literally, but its figurative use emphasizes speed, force, and surprise. In British English, the shorter noun “bolt” is also common for a lightning discharge.
Easily confused with thunderbolt
A thunderbolt is an individual strike of lightning, whereas a thunderstorm is a weather event that produces thunder and often lightning.