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Definitions

reactor

[ree-ak-ter] / riˈæk tər /
NOUN
electrical device
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The plasma in a fusion reactor reaches extraordinarily high temperatures, measured in millions of degrees Fahrenheit.

From The Wall Street Journal • Apr. 6, 2026

Not everyone is fully on board, however — including Isaacman, whose ambitious plans involve developing a lunar nuclear reactor by 2030.

From MarketWatch • Mar. 31, 2026

Investors are cautious about new nuclear reactor investments due to high costs, preferring clear paths and risk mitigation.

From Barron's • Mar. 30, 2026

Dan Eggers, Constellation’s senior vice president for finance, told Barron’s last week that any new reactor investments would have to clear a high bar.

From Barron's • Mar. 30, 2026

The reactor is surrounded by a containment structure, a chamber of steel-reinforced concrete as much as 5 feet thick—strong enough to hold the contents of the reactor if the steel vessel fails.

From "Meltdown" by Deirdre Langeland