noun, often attributive
fu·​sion | \ ˈfyü-zhᵊn How to pronounce fusion (audio) \

Definition of fusion

1 : the act or process of liquefying or rendering plastic by heat
2 : a union by or as if by melting: such as
a : a merging of diverse, distinct, or separate elements into a unified whole Opera is a fusion of several arts.
b : a political partnership : coalition a fusion of Democrats and independent RepublicansNew York Times
c : popular music combining different styles (such as jazz and rock)
d : food prepared using techniques and ingredients of two or more ethnic or regional cuisines a restaurant that specializes in Indian-Chinese fusion

called also fusion cuisine

3 : the union of atomic nuclei to form heavier nuclei resulting in the release of enormous quantities of energy when certain light elements unite nuclear fusion

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Examples of fusion in a Sentence

a fusion of different methods a fusion of musical styles The show is a fusion of news and entertainment. The fusion of different cultural influences is evident in her sculpture.
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Recent Examples on the Web Juan and Marissa Lozano's food truck serves a small but tasty menu of Latin fusion food, and the tostadas ($12) are the main attraction. Nicole Hvidsten, Star Tribune, "5 best things our food writers ate in the Twin Cities this week," 23 Apr. 2021 And her fusion of jes’ folks Americans and a Hollywood lead works in moving and intuitive ways. BostonGlobe.com, "The Oscars: who should win, who will, who shouldn’t be here, who ought to be," 22 Apr. 2021 There's an Indian joint that's like an Indian and New Orleans fusion, it's called Saffron. Steve Baltin, Forbes, "Q&A: Ivan Neville On How Funk And Anger Over Racism Fueled Dumpstaphunk’s Stellar New Album," 21 Apr. 2021 Lots of other technologies—genetic engineering, high-temperature superconductors, nanotechnology and fusion energy come to mind—have gone through phases of irrational exuberance. John Horgan, Scientific American, "Will Quantum Computing Ever Live Up to Its Hype?," 20 Apr. 2021 In a Silent Way, Miles Davis (1969) So many of Miles’s distinct eras lend themselves to contemplation: the sparse modal playing of Kind of Blue, the throbbing mystery of mid-’70s fusion efforts like Agharta, even the tone poems of Sketches of Spain. Vulture Editors, Vulture, "101 Trippy Movies, Albums, Books, TV Shows, and More.," 20 Apr. 2021 Recipes for both of those fusion creations ended up in their book, Food Between Friends, which hit shelves in March. Jenny Comita, Better Homes & Gardens, "Kitchen Kismet," 16 Apr. 2021 Producers like Blaq Jerzee, Pheelz, and London have created a sonic fusion in Savage’s music that blends classic Afrobeats instrumentals (saxophone, horn, drums) with modern synthesizer cords. Danielle Kwateng, Allure, "Tiwa Savage, the Queen of Afrobeats, Fights the Patriarchy," 16 Apr. 2021 That then, yes, spikes the cell and initiates the fusion that allows the virus to unload its genetic cargo. Jon Cohen, Science | AAAS, "Vaccines that can protect against many coronaviruses could prevent another pandemic," 15 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fusion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fusion

14th century, in the meaning defined at sense 1

History and Etymology for fusion

borrowed from Medieval Latin fūsiōn-, fūsiō "process of pouring, casting of molten metal," going back to Latin, "process of pouring, effusion," from fud-, variant stem of fundere "to pour, shed, cast (liquid metal)" (Medieval Latin also, "to melt down, make liquid") + -tiōn-, -tiō, suffix of verbal action — more at found entry 5

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Learn More about fusion

Time Traveler for fusion

Time Traveler

The first known use of fusion was in the 14th century

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Statistics for fusion

Last Updated

5 May 2021

Cite this Entry

“Fusion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fusion. Accessed 16 May. 2021.

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More Definitions for fusion



English Language Learners Definition of fusion

: a combination or mixture of things
physics : a process in which the nuclei of atoms are joined
: a type of popular music that combines different styles (such as jazz and rock)


fu·​sion | \ ˈfyü-zhən How to pronounce fusion (audio) \

Kids Definition of fusion

1 : an act of fusing or melting together
2 : union by or as if by melting
3 : union of atomic nuclei to form heavier nuclei resulting in the release of enormous quantities of energy


noun, often attributive
fu·​sion | \ ˈfyü-zhən How to pronounce fusion (audio) \

Medical Definition of fusion

1a : the act or process of liquefying or rendering plastic by heat
b : the liquid or plastic state induced by heat
2 : a union by or as if by melting together: as
a : a merging of diverse elements into a unified whole specifically : the blending of retinal images in binocular vision
b : a combination of ingredients achieved by heating and mixing together
(1) : a blend of sensations, perceptions, ideas, or attitudes such that the component elements can seldom be identified by introspective analysis
(2) : the perception of light from a source that is intermittent above a critical frequency as if the source were continuous

called also flicker fusion

— compare flicker
d : the surgical immobilization of a joint — see spinal fusion
3 : the union of atomic nuclei to form heavier nuclei resulting in the release of enormous quantities of energy when certain light elements unite

called also nuclear fusion

Other Words from fusion

fusional \ -​ᵊl How to pronounce fusion (audio) \ adjective

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