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.
Arcana Coelestia # 1656
1656. Following those conflicts evil and falsity submitted to Him, verse 17.