reactor
noun
re·ac·tor
rē-ˈak-tər 
Examples of reactor in a Sentence
Recent Examples on the Web
Helion is not yet assembling the fusion reactor, which requires additional engineering and design fine-tuning.
—
Jordan Blum, Fortune, 13 Feb. 2026
Rather than building sprawling above-ground facilities, Deep Fission uses directional drilling to house its reactors.
—Aman Tripathi, Interesting Engineering, 11 Feb. 2026
This is part of their sustainability goals and secures them part of the capacity from these reactors.
—Anne T. Griffin, Forbes.com, 26 Jan. 2026
First American Nuclear is dedicated to building small modular reactors, or SMRs, which are advanced nuclear reactors that have about one-third the generating capacity of traditional nuclear reactors, according to the International Atomic Energy Agency.
—Maya Wilkins, Chicago Tribune, 24 Jan. 2026
See All Example Sentences for reactor
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jordan Blum, Fortune, 13 Feb. 2026
Rather than building sprawling above-ground facilities, Deep Fission uses directional drilling to house its reactors.
—Aman Tripathi, Interesting Engineering, 11 Feb. 2026
This is part of their sustainability goals and secures them part of the capacity from these reactors.
—Anne T. Griffin, Forbes.com, 26 Jan. 2026
First American Nuclear is dedicated to building small modular reactors, or SMRs, which are advanced nuclear reactors that have about one-third the generating capacity of traditional nuclear reactors, according to the International Atomic Energy Agency.
—Maya Wilkins, Chicago Tribune, 24 Jan. 2026
See All Example Sentences for reactor
Cite this Entry
“Reactor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reactor. Accessed 15 Feb. 2026.
Copy CitationKids Definition
reactor
noun
re·ac·tor
rē-ˈak-tər
1
: one that reacts
2
: a device for the controlled release of nuclear energy (as for producing heat)
Medical Definition
reactor
noun
re·ac·tor
rē-ˈak-tər
1
2
a
: a piece of equipment in which a chemical reaction and especially an industrial chemical reaction is carried out
b
: a device for the controlled release of nuclear energy (as for producing heat)
Love words? Need even more definitions?
Merriam-Webster unabridged
