A more complete definition of preterism exists at Wikipedia, but in short, preterism is a doctrine holding that all (or most) of the events prophesied in the New Testament (including those in Revelation) were fulfilled in the past, specifically in 70 AD.
The core tenets of preterism would require that one believes and accepts that Scripture harmoniously teaches all of the following:
- The second coming of Jesus already happened in 70 AD. In particular, any/all statements in the New Testament about Jesus coming “soon” or “shortly” should be understood literally and immediately in the context of their (the direct audience being addressed) timeframe.
- All of God’s promises were fulfilled by/before 70 AD.
- All prophecy must be interpreted in its original context.
- There is no bodily resurrection. In particular, Paul’s treatise on the resurrection in 1 Corinthians 15 is only speaking of a spiritual resurrection.
- Any/all “end of time” statements are describing the end of the Jewish time and the Old Covenant.
- All of the Bible was written before 70 AD.
(Feel free let us know if there is something missing or anything that is not accurate or misleading about this list.)