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Definition of Fall-out shelter
1. Noun. A thick-walled building, usually under the ground, built so that people can keep away from dust after a nuclear explosion. ¹
¹ Source: wiktionary.com
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1. Noun. A thick-walled building, usually under the ground, built so that people can keep away from dust after a nuclear explosion. ¹
¹ Source: wiktionary.com