In short
The Church
The church is the community of believers who confess Jesus Christ as Lord and Saviour. It is God's family, the body of Christ, called together to worship, to learn from His Word, to share the Lord's Supper, to serve and to take the gospel to the world.
Read it in the Bible
Genesis 12:1-3; Matthew 16:13-20; Ephesians 4:11-15; 1:22, 23; Colossians 1:17, 18
This is a short summary. The church's full statements are at adventist.org, and our pastors are glad to study any belief with you.