It means exactly what it says: that the Catholic Church and the Catholic Church alone is the one, true Church of Jesus Christ.
That's exactly the same thing every Catholic says every Sunday when he recites the Nicene Creed.
Some people on this thread are trying to twist it to say that the Pope is saying non-Catholics are not Christians.
That is not the teaching.
Anyone who is validly baptized - be they Baptist or Lutheran or Methodist or Greek Orthodox - is a Christian.
However, the organizations they belong to are not the Church. Their baptism makes them Christians, not their membership in an SBC congregation, or the Missouri Synod, or what have you.
I’m just wondering what the RC freepers would say if another brand of Christianity made such statements regarding them.
Me, I expect such arrogance from your church and am quite used to it.
Oh no they aren’t. Only those who have asked the Lord Jesus Christ into their lives to be their Lord and Saviour are Christians. Baptism is important but it doesn’t save anyone. We’re to believe and be baptized. Believing on the Lord Jesus Christ is our salvation.