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civil defense

American  

noun

  1. plans or activities organized by civilians and civilian authorities for the protection of civilian population and property in times of such disasters or emergencies as war or floods.


Etymology

Origin of civil defense

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

South Korea has massively invested in civil defense.

From The Wall Street Journal • Apr. 10, 2026

"It requires surveys to discover and track NEOs, campaigns to characterize those that are hazardous, modeling efforts to understand and predict impact effects and associated consequences, and mitigation through impact avoidance and/or civil defense."

From Science Daily • Oct. 31, 2025

According to Laura Velazquez, the head of Mexico's civil defense authority, the states of Veracruz, Hidalgo and Puebla were hardest hit by flooding brought on by days of heavy rains.

From Barron's • Oct. 13, 2025

The Eisenhower administration, busy building a civil defense network in the middle of the Cold War, worked with Congress to pass new disaster relief laws.

From Salon • Jan. 26, 2025

As if striving to say something even less helpful, New York’s top civil defense official said, “As far as shelters for the majority of our citizens is concerned—of course, we don’t have any.”

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

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