n.
Pronunciation: ' fyü-zh ə n
Function: noun
Usage: often attrib
Etymology: Latin fusion-, fusio, from fundere
Date: 14th century
1 : the act or process of liquefying or rendering plastic by heat
2 : a union by or as if by melting: as a : a merging of diverse, distinct, or separate elements into a unified whole b : a political partnership : COALITION c : popular music combining different styles (as jazz and rock) d : food prepared using techniques and ingredients of two or more ethnic or regional cuisines ― 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