When people think of church, they generally think of a building, as in “go to church.” Other times it is a reference to a denomination, such as the Baptist church or the Catholic church. Although commonly used and understood, this is not what the Bible means by church.
In a local or micro sense, church is understood to mean a group of people who meet together, such as “the church that meets in your home” (Philemon 1:2 or Colossians 4:15).
It a global or macro sense, Church simply refers to all who follow Jesus (Matthew 16:18). As such, there is only one Church. This is sometimes called the universal church.