nuclear fusion

noun

physics
: a process in which the nuclei of atoms are joined

Examples of nuclear fusion in a Sentence

Recent Examples on the Web
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.
Then, as the Universe cools further, nuclear fusion reactions can proceed, first forming deuterium out of protons and neutrons and then synthesizing heavier elements, like helium, and then (if there’s enough energy) lithium and heavier elements, after that. Ethan Siegel, Big Think, 16 Sep. 2025 However, rather than being powered by nuclear fusion, like stars are, the engines of these objects are supermassive black holes greedily feeding on surrounding matter and blasting out energy. Robert Lea, Space.com, 15 Sep. 2025 Bill Gates' venture capital firm, Gates Frontier, was also an investor in the nuclear fusion startup's Series B2 round. Hayley Cuccinello, CNBC, 4 Sep. 2025 However, even though nuclear fusion holds promise for providing abundant, emission-free energy, Tarnowsky highlights that there is still no commercial tritium production in the US. Georgina Jedikovska, Interesting Engineering, 1 Sep. 2025 See All Example Sentences for nuclear fusion

Browse Nearby Words

Cite this Entry

“Nuclear fusion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nuclear%20fusion. Accessed 20 Sep. 2025.

Medical Definition

nuclear fusion

noun
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!