Can someone please explain shatterproof glass to me?

You know how in the stores, there are glass vases, bowls, and other things, where the glass is all cracked and broken but it stays together? I was told that was called shatterproof glass, and when I looked it up on Google Images, sure enough, I saw photos of glass that was all cracked and broken, but it stayed together. However, when I looked up the definition of shatterproof glass, it says that it's glass that doesn't shatter (duh) but by "shatter" does that mean fall apart? I'm so confused, and yes, I know I probably sound like an idiot :p (I also didn't know which category to put this question in)