It's been done already by [cgraeser](https://github.com/cgraeser/vim-markdown/commit/d049d36988e5799b5ee112d45b7a9a3e0019fdf4). Once definition lists from PHP Markdown Extra got it, they should trigger folding too.
Activity
gadamiak commentedon Jul 10, 2013
Is this one feasible? Folding would be really useful. Now I need to add foldmarks manually. Or, is there another way to fold Markdown?