Definition lists take the form:
<DL> <DT> term name <DD> term definition ... </DL>
DT elements can only act as containers for text level elements, while DD elements can hold block level elements as well, excluding headings and address elements.
For example:
<DL> <DT>Term 1<dd>This is the definition of the first term. <DT>Term 2<dd>This is the definition of the second term. </DL>
which could be rendered as:
The COMPACT attribute can be used with the DL element as a hint to the user agent to render lists in a more compact style.