atomic bomb

noun

1
: a bomb whose violent explosive power is due to the sudden release of energy resulting from the splitting of nuclei of a heavy chemical element (such as plutonium or uranium) by neutrons in a very rapid chain reaction

called also atom bomb

2
: a nuclear weapon (such as a hydrogen bomb)

Examples of atomic bomb in a Sentence

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Just a few weeks later, on August 6, 1945, the first atomic bomb used in warfare detonated approximately 580 meters above Hiroshima — a city of 350,000 located on the coastal plain of the Chugoku region in western Honshu, Japan. David Bressan, Forbes.com, 16 July 2025 In 1945: The Manhattan Project successfully detonated the world’s first atomic bomb at Alamogordo, New Mexico. Lorenzino Estrada, AZCentral.com, 16 July 2025 Read the story » More Top Stories Can Trump Deport People to Any Country That Will Take Them? Justin Bieber’s Messy, Improbable Masterpiece Our Culture Picks Read: Eighty years ago today, the first atomic bomb was tested near Alamogordo, New Mexico. Kyle Chayka, New Yorker, 16 July 2025 From the beginning of the Manhattan Project to develop an atomic bomb, Britain along with Canada was a close partner of the United States. Arthur I. Cyr, Chicago Tribune, 15 July 2025 See All Example Sentences for atomic bomb

Word History

First Known Use

1914, in the meaning defined at sense 1

Time Traveler
The first known use of atomic bomb was in 1914

Cite this Entry

“Atomic bomb.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic%20bomb. Accessed 29 Jul. 2025.

Kids Definition

atomic bomb

noun
1
: a bomb whose violent explosive power is due to the sudden release of energy resulting from the splitting of nuclei of a heavy chemical element (as plutonium or uranium) by neutrons

called also atom bomb

2

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