That health care plan was created by the Nixon administration and supported by every republican president between Nixon-Bush. Do you really believe Richard Nixon was a socialist? Ronald Reagan, he was a socialist? Mitt "corporations are people too" Romney is a socialist? You're out of your mind if you really believe that.
That's not what socialism means.
That's also not what socialism means.
That's not a definition, that's an editorial statement. It's also not on the MW page, I just checked.
http://www.merriam-webster.com/dictionary/socialism