Several times I've had need of a dictionary on my iPhone but, alas, dictionary applications are unusually expensive. Yesterday I again found need for a dictionary and decided it was time to bite the bullet. I went snooping in the App Store and was surprised to find an excellent (and free) dictionary application from Dictionary.com.
I've only been using it a few days but I really like it. Did I mention it is free? If you've been waiting for a dictionary application, check this one out.