"The use of the word church itself seems problematic to me. The church is not a place that you go for a while and it is not something people skip either. It is an identity and a lifestyle."

I think that's one of the best definitions of church I've come across in a long time.

"It isn’t so much that the Church has a mission as it is that the Mission has a Church. The Church then is that community that is pursuing God and doing Mission together."

http://jon-dengler.blogspot.com/2012/07/how-not-to-speak-about-church.html