1.3 Definition list
(1) Grammar
```
<dl>
<dt>Define</dt>
<dd>Description</dd>
...
</dl>
```
(2) Semantics
- list with term definitions and descriptions
- Comments (descriptions) for dl custom list, dt custom list item, dd custom list item
- Used to group a set of items and their associated descriptions
(3) Default style
- default dl, dd with spacing
(4) Typical application
- Noun explanation, classification (big classification-detailed category)
- list of key-value pairs (memory: 100M)
**Notice:**
Multiple item definitions and descriptions are allowed.
```HTML
<dl>
<dt>Name</dt>
<dd>Li Meili</dd>
<dt>birthday</dt>
<dd>1990</dd>
</dl>
```
Allows a single item definition with multiple descriptions.
```HTML
<dl>
<dt>Join us</dt>
<dd>Social recruitment</dd>
<dd>Campus recruitment</dd>
<dd>International Recruitment</dd>
</dl>
```