title: What does "both" mean in <div style="clear:both">
body: <pre><code>&lt;div style="float:left"&gt;Hello&lt;/div&gt;
  &lt;div style="float:right"&gt;Howdy dere pardner&lt;/div&gt;
  &lt;div style="clear:both"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I get what it does, but why the name <code>both</code>?  What does <code>both</code> <em>mean</em>?</p>