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

Fastly rises after Oppenheimer upgrades shares to Outperform, citing anticipated revenue boosts from AI agent traffic and Grand Theft Auto VI.

From Barron's ● Oct. 9, 2026

Oppenheimer analyst Kristen Owen wrote last month that Corteva recently “presented a solid standalone investment thesis built on the diversity and balance of its portfolio and innovation pipeline.”

From MarketWatch ● Oct. 1, 2026

While stationed in the area, Oppenheimer was constantly looking for work.

From The Wall Street Journal ● Sep. 29, 2026

Some may take issue with likening Oprah Winfrey to J. Robert Oppenheimer, the father of the atomic bomb.

From Salon ● Sep. 27, 2026

At the semester break every spring when Oppenheimer decamped for Caltech, the entourage followed him south in a caravan of rickety vehicles.

From "Big Science" by Michael Hiltzik

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