TITLE: What is the exact meaning of "fusion" in the terminology “fusion category”？
QUESTION [6 upvotes]: 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.

REPLY [7 votes]: I think that
$$
\text{"the process or result of joining two or more things together to form one"}
$$
Is a good description, that also reflects the origin of the terminology in the term "fusion category". Here, the things that are being joined (=fused) are the objects of the category, and the new entity that they form after fusion is their product (also called tensor product, or fusion product) in the category.