lightning

American  

[lahyt-ning] / ˈlaɪt nɪŋ /

noun

1. a brilliant electric spark discharge in the atmosphere, occurring within a thundercloud, between clouds, or between a cloud and the ground.

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verb (used without object)

lightninged, lightning

1. to emit a flash or flashes of lightning (often used impersonally with it as subject).

   If it starts to lightning, we'd better go inside.

adjective

1. of, relating to, or resembling lightning, especially in regard to speed of movement: lightning speed.

   lightning flashes;

   lightning speed.

idioms

1. catch lightning in a bottle. see catch lightning in a bottle.

lightning British  

/ ˈlaɪtnɪŋ /

noun

1. a flash of light in the sky, occurring during a thunderstorm and caused by a discharge of electricity, either between clouds or between a cloud and the earth

2. (modifier) fast and sudden

   a lightning raid

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lightning Scientific  

/ līt′nĭng /

1. A flash of light in the sky caused by an electrical discharge between clouds or between a cloud and the Earth's surface. The flash heats the air and usually causes thunder. Lightning may appear as a jagged streak, as a bright sheet, or in rare cases, as a glowing red ball.

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lightning Cultural  

1. An electrical discharge from clouds that have acquired an electrical charge, usually occurring during storms. (See thunder.)

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lightning More Idioms  

More idioms and phrases containing lightning

• like greased lightning
• quick as a wink (lightning)

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Closer Look

As storm clouds develop, the temperature at the top of the cloud becomes much cooler than that at the bottom. For reasons that scientists still do not understand, this temperature difference results in the accumulation of negatively charged particles near the base and positively charged particles near the top of the storm cloud. The negatively charged particles repel the electrons of atoms in nearby objects, such as the bases of other storm clouds or tall objects on the ground. Consequently, these nearby objects take on a positive charge. The difference in charge, or voltage, builds until an electric current starts to flow between the objects along a pathway of charged atoms in the air. The current flow heats up the air to such a degree that it glows, generating lightning. Initially, a bolt of lightning carrying a negative charge darts from one storm cloud to another or from a storm cloud to the ground, leaving the bottom of the cloud with a positive charge. In response, a second bolt (reverse lightning) shoots in the opposite direction (from the other storm cloud or the ground) as the mass of negative charges on it moves back to neutralize the positive charge on the bottom of the first cloud. The heat generated by the lightning causes the air to expand, in turn creating very large sound waves, or thunder.

Etymology

Origin of lightning

First recorded in 1350–1400; Middle English, variant of lightening; see lighten ¹, -ing ¹

Compare meaning

How does lightning compare to similar and commonly confused words? Explore the most common comparisons:

• lightning vs. lightening

Explanation

When you see sudden bright flashes of light in the sky, you're seeing lightning, the release of electricity between clouds or the ground. Lightning can be scary, and if it strikes a person, it can kill. You can tell how close the lightning is by how long the delay is between the light and the sound of the rolling roar or crack of thunder that accompanies it. If they're close together, get inside, quick! Because lighting strikes so fast, we use its name for other speedy things, like the lightning-fast service at a good coffee shop.

Example Sentences

See Examples For:

lightning lightninged

He became a millionaire in the process and his legacy in southern Africa has become a lightning rod for discussions about "decolonising" institutions which continue to bear his name.

From BBC ● Jul. 14, 2026

Along the way, the camera-equipped, audio- and video-recording devices have become a privacy lightning rod.

From The Wall Street Journal ● Jul. 14, 2026

Heat domes can cause "dry thunderstorms," in which rain evaporates before hitting the ground and lightning strikes are liable to trigger wildfires, as much of the western United States is already experiencing drought conditions.

From Barron's ● Jul. 14, 2026

That pattern causing the humidity is also expected to produce some showers and thunderstorms in the mountains, which will increase the possibility of fire starts from lightning strikes.

From Los Angeles Times ● Jul. 13, 2026

Or had lightning strikes started other, smaller wildfires on this side of the ridge too?

From "Two Degrees" by Alan Gratz

Or really, lightninged out by area storms after only three holes.

From Golf Digest ● Aug. 9, 2019

Having thus lightninged and thundered, Architect Warren ended his declaration with a statement mild as milk.

From Time Magazine Archive

That night it thundered and lightninged, and Antha nearly went into hysterics.

From The Campfire Girls on Ellen's Isle The Trail of the Seven Cedars by Frey, Hildegard G. (Hildegard Gertrude)

When it thundered and lightninged that old hoss started to dance—thought twas a battle.

From Slave Narratives: a Folk History of Slavery in the United States From Interviews with Former Slaves Arkansas Narratives, Part 2 by Work Projects Administration

It thundered and lightninged incessantly, so that his ears rang and his eyes were blinded.

From The Chinese Fairy Book by Wilhelm, Richard