Definition of fusion noun from the Oxford Advanced American Dictionary

     

    fusion

     noun
    noun
    NAmE//ˈfyuʒn//
     
     
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  1. 1[uncountable, singular] the process or result of joining two or more things together to form one the fusion of copper and zinc to produce brass The movie displayed a perfect fusion of image and sound.
  2. 2(also nuclear fusion) [uncountable] (physics) the act or process of combining the nucleus (= central parts) of atoms to form a heavier nucleus, with energy being released compare fission
  3. 3[uncountable] music that is a mixture of different styles, especially jazz and rock
  4. 4[uncountable] cooking that is a mixture of different styles French–Thai fusion
See the Oxford Advanced Learner's Dictionary entry: fusion