What is the point of teaching grammar?

I like this definition much better. I wonder what people think is the best monolingual dictionary for intermediate level and above leaners of English ? (paper and online)

I like wordweb - downloadable for free. I prefer students to use an English-English dictionary and only want them to resort to a Chinese one for the complex.

This question about dictionaries merits its own thread so I’ve copied your comments and started a new thread. See here segue.com.tw//viewtopic.php?p=34561#34561