Oppenheimer

American  

[op-uhn-hahy-mer] / ˈɒp ənˌhaɪ mər /

noun

1. J(ulius) Robert, 1904–67, U.S. nuclear physicist.

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Oppenheimer British  

/ ˈɒpənˌhaɪmə /

noun

1. J ( ulius ) Robert. 1904–67, US nuclear physicist. He was director of the Los Alamos laboratory (1943–45), which produced the first atomic bomb. He opposed the development of the hydrogen bomb (1949) and in 1953 was alleged to be a security risk. He was later exonerated

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Oppenheimer Scientific  

/ ŏp′ən-hī′mər /

1. American physicist who directed the Los Alamos, New Mexico, laboratory during the development of the first atomic bomb (1942–1945). After World War II, he became an advocate for the peaceful use of atomic energy and opposed the development of the hydrogen bomb.

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Example Sentences

The pages capture the inner thoughts of someone who found himself at the center of history, as if Oppenheimer grabbed a pen and bared his soul during the Manhattan Project.

From The Wall Street Journal • May 9, 2026

Oppenheimer notes that the cybersecurity company has increased use of AI coding tools and AI usage has increased 600% in three months.

From The Wall Street Journal • May 8, 2026

Oppenheimer analyst Rick Schafer also fell short of endorsing of the stock.

From Barron's • May 6, 2026

A new full-length trailer has been released for The Odyssey, the first film from director Christopher Nolan since the Oscar-winning Oppenheimer.

From BBC • May 5, 2026

I wonder if this was what it was like for Oppenheimer and his team of scientists when they were working on the bomb.

From "The Fourteenth Goldfish" by Jennifer L. Holm