Kingdom
In the most general sense, a kingdom in the Bible represents a church. In a more specific sense, a kingdom represents a church in regards to the ideas it has about the Lord and life. In a more specific sense yet, a kingdom represents that truth itself, the doctrinal ideas that make a church what it is.
Isaiah 43:19
19
Behold, I will do a new thing. It springs forth now. Don't you know it? I will even make a way in the wilderness, and rivers in the desert.