Thank you Sean for clearly pointing out my intention. It is not to define a links course to someone who knows what it is. It is to define it to someone who barely understands golf. The best answer I saw was fescue. I know there are courses with fescue that are not links courses.
I also understand a simple definition is going to leave room for error. If the error is small enough, it won' much matter to the infrequent golfer.