Blockchain = trust, this is totally truth. I have explaining blockchain in this way to my friends as well :).
Just small remark about the blockchain and bitcoin. When bitcoin come out, the word blockchain was not even exciting. In bitcoin white paper there is no such a word.
So no bitcoin, no blockchain. We need to give it some respect to the btc. Maybe bitcoin technology is better word for blockchain. But now is to late .... the blockchain buzz is everywhere :).