Definition of "nuclear holocaust" []

• The possibility of complete annihilation of human civilization by nuclear war. (noun)

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• "So, with Nixon’s permission, over the famed hotline used by President Kennedy and Soviet premier Nikita Khrushchev to avert nuclear holocaust during the Cuban Missile Crisis of 1962, Borman sent a message to the head of the USSR Academy of Sciences, sixty-eight-year-old Mstislav V."
• "If a giant asteroid is going to blow us up or the sun is gonna scorch us all . . . or the poles will shift, sending us into another ice age following biblical-type floods, earthquakes, and pandemic outbreaks or some nuclear holocaust . . . dude . . . then, like, why are you here?"