Definition lists are meant to type a set of terms together with their explanation. It’s usage is identical to the one in HTML, with the exception that it cannot occur inside ordinary text: surrounding text should always be enclosed in paragraph tags.
Example:
<dl> <dt>meOne</dt><dd>First element of the enumeration type.</dd> <dt>meTwo</dt><dd>Second element of the enumeration type.</dd> <dt>meThree</dt><dd>Third element of the enumeration type.</dd> </dl>
Will be typeset as
meOne
First element of the enumeration type.
meTwo
Second element of the enumeration type.
meThree
Third element of the enumeration type.