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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

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

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

From Barron's • Mar. 30, 2026

The partially disassembled research reactor, nicknamed “Norm,” is the latest design in a decadeslong pursuit by TAE to create a star on Earth.

From The Wall Street Journal • Mar. 28, 2026

But the prolonged high pressure in the chamber below it had worked the bolts loose, and hydrogen gas was escaping into the reactor building.

From "Meltdown" by Deirdre Langeland