How to set up tinymce so that users can use definition lists

I have installed tinymce so that my user can use definition lists on the content field. However when I click html I can only see p tag wrap around my content. Any chance that I can config my tinymce installed in modx. This this just the example on TYPO3https://forge.typo3.org/issues/9387

You might want to take a look at your TinyMCE settings which are located under System Settings. You can find some general settings by using the Rich Text Editor filter (under the core group), the rest of the settings are located under TinyMCE instead of the Core group.