Church is when a group of believers gathers together around the living, resurrected Jesus Christ and focuses their attention on listening to His voice and doing whatever He tells them to do.
Church is when the living Christ, in a gathered group of Christ-followers, speaks to the people through the people. (See 1 Corinthians 14:26.)
When 1 speaks to all, all but 1 have nothing to do but listen, creating passivity. When all speak to all as led by the living, resurrected Jesus Christ, all are actively engaged, creating community.