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

See Examples For:

Oppenheimer

“We think it creates a great degree of buy-in from public water agencies,” Oppenheimer said.

From Los Angeles Times ● Aug. 19, 2026

The comments underscore AMD’s fierce competition in the space, with Oppenheimer analysts writing in a note that the company may continue playing catch-up with Nvidia.

From The Wall Street Journal ● Aug. 6, 2026

Nolan's first movie since 2023 Oscar-winner "Oppenheimer", it has wowed audiences and critics, topping the US box office for two straight weeks and already taking $640 million worldwide.

From Barron's ● Jul. 30, 2026

It is the director's first movie since 2023's Oppenheimer, which won the Academy Award for best picture.

From BBC ● Jul. 28, 2026

Led by a physicist named Robert Oppenheimer, the team succeeded, testing the world’s first atomic bomb in the New Mexico desert in July 1945.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin