Fusion may refer to:

• the merging of two or more entities into a single one
  • For the combining of two atomic nuclei into a single nucleus (with possible emission of radioactivity), see nuclear fusion
    • cold fusion refers to a hypothetical form of nuclear fusion
    • See fusion power for a discussion of using nuclear fusion as an energy source
  • For the formation of bone joining two bone segments, such as by disease or between vertebrae after discectomy, see ankylosis
    • and for surgery to produce such a result, see arthrodesis
  • For the perception of a unified scene from the separate sensations of two eyes, see binocular fusion
  • For fusion of cultural entities, in the case of
    • Food, see fusion cuisine
    • Music, see jazz fusion and fusion music
    • Politics, see electoral fusion
  • For fusion of two cell nuclei, see karyogamy.
  • For fusion of two genes, see chromosomal translocation.
  • For the comic book, see Fusion (comics)

• melting
  • For the heat energy absorbed by a solid material at its melting point, in becoming a liquid at the same temperature, see heat of fusion.
  • For the electrical device designed to interrupt a circuit, by its conductor melting and detatching from the rest of the conducting path, in response to excessive current, see fuse

• electoral fusion is an arrangement between political parties to pool votes for a single candidate.