Improving your word power is a thing we all want to do, but always drift away from the pain required. In our childhood we always avoided opening that pocket dictionary and always thought “I will do it later” or “This is not the only word in English”. It was a real hard work for finding word meaning in a crude Alphabetical classification. Then internet and computer came and things became simpler. Either you have to open a dictionary software or use Dictionary.com kind of websites.
Here is an even simpler plugin from Google which takes just your Double Click effort for knowing a word meaning. A tool tip opens up after clicking a word and the meaning in a concise way gets displayed.