1. （数量上的）优势，大多数，主体
If there is a preponderance of one type of person or thing in a group, there is more of that type than of any other.

1. exceeding in heaviness
having greater weight

e.g. the least preponderance in either pan will unbalance the scale

2. a superiority in numbers or amount

e.g. a preponderance of evidence against the defendant

Synonym: prevalence

3. superiority in power or influence

e.g. the preponderance of good over evil
the preponderance of wealth and power