I believe the song meaning is about Lisa falling in love with someone who lives in Ireland. However, Lisa is on the road a lot in other countries. Perhaps she is in the United States in this song. She can't stop thinking about him, even though he is literally an "ocean and a rock" away, which is a very poetic way of referring to the other side of the world. The end of the song shows the hope in her returning to Ireland.
I believe the song meaning is about Lisa falling in love with someone who lives in Ireland. However, Lisa is on the road a lot in other countries. Perhaps she is in the United States in this song. She can't stop thinking about him, even though he is literally an "ocean and a rock" away, which is a very poetic way of referring to the other side of the world. The end of the song shows the hope in her returning to Ireland.