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

Analysts at Oppenheimer have a $250-per-share price target, which implies a 35% increase.

From MarketWatch • Jun. 22, 2026

According to analysts at Oppenheimer, tracking how Tesla spends its cash may provide some insight.

From MarketWatch • Jun. 18, 2026

Last week, Oppenheimer analyst Rick Schafer described the tone as “bullish” in a discussion with Broadcom executives.

From Barron's • Jun. 17, 2026

In a recent report on SpaceX’s potential impact on the telecom industry, Oppenheimer analyst Tim Horan wrote EchoStar’s Boost mobile phone service could appeal to SpaceX.

From Barron's • Jun. 12, 2026

Strauss’s enmity for Oppenheimer deepened as the latter’s opposition to the hydrogen bomb solidified.

From "Big Science" by Michael Hiltzik