noun

1. a fusing or melting together
2. 1. the union of different things by or as if by melting; blending; coalition a fusion of political parties
   2. the state or fact of being so united
3. anything made by fusing
4. nuclear fusion
5. Linguis.
   1. in some languages, the use of morphemes that combine different semantic categories (Ex.: in Latin amō, “I love,” -ō indicates simultaneously first person subject, singular subject, and present tense)
   2. a joining of morphemes with a marked adjustment of sounds at the point of juncture
6. ☆ a style of popular music originating in the 1970s that blends improvisational elements of jazz with the rhythms, harmonic structure, and bass lines of rock or funk, sometimes adding elements from other musical styles, and usually emphasizing the use of electronic keyboard instruments, electronic modifications in recordings, etc.

Etymology: L fusio