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English definition of “lightning”

lightning

noun [U]     /ˈlaɪt.nɪŋ/
B1 a flash of bright light in the sky that is produced by electricity moving between clouds or from clouds to the ground: thunder and lightning a flash of lightning That tree was struck by lightning. She changed her clothes with lightning speed (= extremely quickly).Stormy weatherWind and winds
(Definition of lightning noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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