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English definition of “nuclear winter”

nuclear winter

noun [C usually singular] uk   specialized us  
a period that scientists believe would follow a large nuclear explosion, when there would be very little light or heat and nothing would grow in the worldEnvironmental issuesRubbish and wasteProtection and protectorsColdSnow and ice
(Definition of nuclear winter from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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