Some parsers have an extension to support description/definition lists. In https://talk.commonmark.org/t/description-list/289 there is a proposal to add it to CommonMark. A common syntax is to put a colon at the beginning of the line.

An example from the Pandoc manual:

Term 1

:   Definition 1

Term 2 with *inline markup*

:   Definition 2

        { some code, part of Definition 2 }

    Third paragraph of definition 2.