Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Origin: lighten 'to become less dark'

lightning

1 noun
     
Related topics: Nature
light‧ning1 [uncountable]
1DN a powerful flash of light in the sky caused by electricity and usually followed by thunder:
Two farmworkers were struck by lightning (=hit by lightning).
2

like lightning

extremely quickly:
Mitch moved like lightning and caught the little girl before she fell.
3

lightning never strikes twice

something bad or unpleasant is not likely to happen to the same people or in the same place twice

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