# What is the exact meaning of “fusion” in the terminology “fusion category”？

I want to translate the terminology “fusion category” into Chinese, so I should know the exact meaning of "fusion". There are two translations in Oxford Advanced Learner’s Dictionary:

1.the process or result of joining two or more things together to form one

2.(also nuclear fusion )( physics )the act or process of combining the nuclei(= central parts) of atoms to form a heavier nucleus, with energy being released

Which one? Or something else?

Maybe, the first one is a better choice. Who can tell me? Thank you in advance.

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the first, this is definitely not physics. –  Carlo Beenakker Apr 26 '14 at 0:42
I'll add that the second one is just a special case of the first one (where the things being joined are the nuclei of the atoms) –  Denis Nardin Apr 26 '14 at 1:43

$$\text{"the process or result of joining two or more things together to form one"}$$