Fu·sion n.
1. The act or operation of melting or rendering fluid by heat; the act of melting together; as, the fusion of metals.
2. The state of being melted or dissolved by heat; a state of fluidity or flowing in consequence of heat; as, metals in fusion.
3. The union or blending together of things, as, melted together.
The universal fusion of races, languages, and customs . . .
had produced a corresponding fusion of creeds. --C. Kingsley.
Watery fusion Chem. the melting of certain crystals by heat in their own water of crystallization.
4. Biol. The union, or binding together, of adjacent parts or tissues.
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