Thanks, Kristine, for this clarification of the terms. 'Sublime' is so often used, incorrectly, to simply mean really beautiful, when it means something much more interesting!

I had a go at defining it in an article for The Signifier, specifically in the context of the Romantics - https://medium.com/signifier/figures-in-the-romantic-landscape-two-early-paintings-by-turner-a42f6d040583 - BTW, if you ever feel you have a piece that fits with The Signifier, which I edit, please let me know!