When I was in Europe, I took an EnglishI_Chinese dictionary with me.  I felt panic since my English was really poor. I never spoke in English before I went to Europe. A dictionary comformed me with the hint that I would get help when I didn't know how to express myself in English.

as a matter of life, it didn't help at all, I had to looked for every word from my brain and from partner, the first person who talked with me in English was a swedish, who just knew a little English, He even didn't know ENEMY, even I showed him the word in dictionary he still didn't understand at all, I had to try to explain what the ENEMY in English, but I failed finally.

Since then, I felt it was necessary to explain English word in English. in Europe, a fellow student used online English-English dictionay. when we could not understand each other, we always opened the online English-English dictionary to communicate with each other. but for me, I perfer to iciba, any words with a Chinese explaination make me understand them profoundly.

But as studying goes on, explanation in English become more and more important. someday ago, I even refered to an online English English dictionary and make it in the reference list. to improve your English, Explain everything in English is really a good way.

here is the webpage of one online English English dictionary, http://www.merriam-webster.com/dictionary/

maybe there are others.