noun, often attributive
fu·sion | \ˈfyü-zhᵊn \

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 RepublicansN. Y. 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

Keep scrolling for more

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.
See More

Recent Examples on the Web

At this afternoon's Fendi Couture show in Paris, makeup was a striking fusion of retro and futuristic, catapulting the iconic cat eye into the realm of the present tense. Calin Van Paris, Vogue, "Fendi Gives the Couture Cat Eye a Bold New Runway Spin," 4 July 2018 Whoever the designer, the dress will be a fusion of classic and modern. Diana Pearl, PEOPLE.com, "Everything We Know About Meghan Markle's Wedding Dress," 7 May 2018 The true artistic endeavor is breaking through to beautiful new worlds and to deeper realities — of achieving a fusion of heart and mind, of understanding the soul and its workings. Joshua Zucker, SFChronicle.com, "John Zorn and Bill Laswell make rare duo appearance at the Chapel," 11 July 2018 Local legends and internationally renowned musicians alike will play a fusion of Latin jazz on Friday, smooth jazz and reggae on Saturday, and straight-ahead jazz with subtle African influences on Sunday. Alison Kuznitz, courant.com, "A Caribbean Flair Hits This Year's Greater Hartford Festival Of Jazz," 2 July 2018 Indeed, dichotomies define her work, which was both exotic and stylish, and pure and baroque—a perfect fusion of force and finesse. Tiziana Cardini, Vogue, "Remembering Gabriella Crespi, a Milanese Original," 15 June 2018 Batth’s versatile range is equipped for all styles, from punk rock to classical Indian and a fusion of the two. Jeff Roy, Condé Nast Traveler, "A Guide to Mumbai's Diverse LGBTQ+ Arts Scene," 13 June 2018 During the day, the costumed ensemble hangs around an assortment of toadstool houses in the performance area—a nightmarish fusion of Gaudi and Disney—where visitors snap crouching selfies. Charlie Campbell / Kunming, Time, "Finding Love in the Kingdom of the Little People," 1 June 2018 The experience of The Latina Sensation and the youthful exuberance of The Virtuosa are a symbolic fusion in the upstart RISE, a women's developmental group now in conjunction with Impact Wrestling. Jim Varsallone, miamiherald, "Women's wrestling with Martinez, Purrazzo on the RISE via Impact Wrestling initiative | Miami Herald," 25 May 2018

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.

See More

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

Keep scrolling for more

Learn More about fusion

Phrases Related to fusion

nuclear fusion

Statistics for fusion

Last Updated

8 Oct 2018

Look-up Popularity

Time Traveler for fusion

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

See more words from the same century

Keep scrolling for more

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 \

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 \

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 \ adjective

Keep scrolling for more

Comments on fusion

What made you want to look up fusion? Please tell us where you read or heard it (including the quote, if possible).


not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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