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

If you want to play Nike’s turnaround without all of Nike’s problems, consider athletic-gear chain Dick’s Sporting Goods, Oppenheimer analysts said Wednesday.

From MarketWatch • Apr. 1, 2026

Artifacts from the birth of the nuclear age are also featured, including items recovered from postwar Hiroshima and a letter from the father of the nuclear bomb, Robert J. Oppenheimer.

From Los Angeles Times • Mar. 27, 2026

Project Hail Mary ranks as the third-bigest non-sequel and non-franchise film to open above $50m overseas since the Covid pandemic, along with Oppenheimer and F1: The Movie.

From BBC • Mar. 23, 2026

“I view the recent launches of Mac products as a major success for Apple near-term and medium-term,” Oppenheimer analyst Martin Yang told Barron’s on Friday.

From Barron's • Mar. 20, 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