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.
It's been done already by cgraeser. Once definition lists from PHP Markdown Extra got it, they should trigger folding too.