`<DL ...>`

Usage Recommendation
use it

COMPACT: take up less space

<DL ...> was originally intended for (and is still very good for) making lists of terms and their definitions.

this code produces this

<DL> <DT>flame <DD>an ugly argument in a newsgroup <DT>spam <DD>annoying unrequested email <DT>troll <DD>someone who start flames by posting stupid things </DL>

flame
an ugly argument in a newsgroup
spam
annoying unrequested email
troll
someone who start flames by posting stupid things

<DL ...> is useful for all sorts of lists. Any situation where you want to say "this is a thing, this is stuff about the thing" is a good time to think about using a definition list. For example, a definition list can be used for a performance script:

this code produces this

<DL> <DT>Mary <DD>So what's going on tonight? <DT>Dawn <DD>Let's play some music <DT>Jason <DD>Cool man, let's jam! </DL>

Mary
So what's going on tonight?
Dawn
Let's play some music
Jason
Cool man, let's jam!