In simple terms, "to reform the chamber" means to make changes or improvements to a group or organization to make it work better or operate more effectively.
Sentences with «to reform the chamber»
Wright's statement also called for reforming the chamber to be more inclusive of rank - and - file members. (politico.com)
«The prime minister says he regrets not reforming the chamber in the last parliament. (theguardian.com)
This helps to ensure that the final two desirable properties of a reformed chamber are achieved. (blog.politics.ox.ac.uk)