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

Recent Examples on the Web
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Chen Ming, a researcher at the Centre for High Pressure Science and Technology Advanced Research and a co-author of the study, explained that the impact released energy equivalent to 600,000 tonnes of TNT – comparable to the destructive force of 40 Hiroshima-sized atomic bombs. Bojan Stojkovski, Interesting Engineering, 25 Oct. 2025 The government also saw no potential threat from an atomic bomb in the hands of enemies or rivals. Literary Hub, 23 Oct. 2025 It was forged probably in the twentieth century because the ink has material in it that didn’t exist before the testing of the atomic bomb. JSTOR Daily, 16 Oct. 2025 The 2024 prize went to Nihon Hidankyo, a grassroots Japanese organization of atomic bomb survivors, at a time when the world was once again confronting the specter of nuclear weapons, amid Russia’s threats during its war in Ukraine. Christian Edwards, CNN Money, 10 Oct. 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 30 Oct. 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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