title: What is "DefinitelyTyped"?
body: <p>I see "DefinitelyTyped" is something related to TypeScript/JavaScript development, but I couldn't understand its use or some code sample to understand about it.</p>
  
  <p>I looked at 
  <a href="http://definitelytyped.org/" rel="noreferrer">http://definitelytyped.org/</a>  and <a href="http://bartvds.github.io/projects/dt.html" rel="noreferrer">http://bartvds.github.io/projects/dt.html</a> but couldn't understand it better.</p>
  
  <p>Any pointers, article, Code sample is much appreciated.</p>