Dynamic languages

[Neuruss]

I've been reading an article published in E-Week entitled "Microsoft
Lures Open-Source Programmer", which contains a definition for dynamic
languages as follows:

"Dynamic programming languages enable programs to change their
structure as they run."

I wonder if this definition is correct. 
Can we define dynamic languages this way?

http://www.eweek.com/article2/0,1759,1636906,00.asp