Answer: make changes in (something, typically a social, political, or economic institution or practice) in order to improve it.
Explanation: Reform means the improvement or amendment of what is wrong, corrupt, unsatisfactory, etc. The use of the word in this way emerges in the late 18th century and is believed to originate from Christopher Wyvill's Association movement which identified “Parliamentary Reform” as its primary aim.

: The democratic republican party was based on the idea that the central government of a country should be what?

:
The democratic republican party was based on the idea that the central government of a country should be

Good Luck on your assignment
U.S. President Abraham Lincoln
I believe that would be Genghis Khan