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

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

In recent years, Christopher Nolan’s Oppenheimer, the journalist Annie Jacobsen’s bestselling Nuclear War: A Scenario, and the video game–turned–TV show Fallout have tackled hypothetical armageddon.

From Slate • Mar. 13, 2026

Oppenheimer analyst Colin Rusch specifically predicts that artificial intelligence could usher in a “renaissance” for blue-collar jobs.

From MarketWatch • Mar. 12, 2026

“I think that the difficult subjects are sometimes the ones that make her more relatable,” Oppenheimer says of his subject.

From Los Angeles Times • Mar. 10, 2026

After the loyalty hearing, Oppenheimer said, “we saw almost nothing of each other.”

From "Big Science" by Michael Hiltzik