I was reading about parsers and parser generators and found this statement in wikipedia\'s LR parsing -page:
Many programming languages can be parsed
I think you are pretty close to the answer.
LR(1) means that parsing from left to right needs only one token to look-ahead for the context, whereas LR(∞) means an infinite look-ahead. That is, the parser would have to know everything that was coming in order to figure out where it is now.