Thew interface of the Dictionary is quite simple and easy going. On the right side of the interface there is a search bar where you can type the required word. The dictionary will tell you the meaning of your required word with oral pronunciation so that you can also learn how to exactly speak the required word. It will also tell you whether the typed word is a noun, pronoun or verb. It will also show a list of matching word to those of the typed words so that you can quickly jump to those words if you need to know their meaning. Cambridge Advanced Learner Dictionary is another great option.
All in all Longman Dictionary Of Contemporary English is a very handy dictionary which will empower your vocabulary of English and will enable you to speak with the native English people easily.