Are you learning Danish and are looking for online dictionaries? Here are a few useful links.
Bab.la – Danish-English-Danish, free online dictionary. This dictionary is not very good, but it’s better than nothing. Several other dictionaries (other languages) are available in this site as well.
Sproget.dk – Very good, free Danish-Danish dictionary.
Den Danske Ordbog from the website Ordnet.dk. It is free and sponsored by the Carlsberg foundation, among others. This too is a dictionary of definitions dansk-dansk.
Ordbogen.com – If I’m not mistaken it is possible to search two words per day free of charge. But else a subscription is required. They have several languages though: Danish-Englisn, Danish-German, Danish-French and so on.