Wikipedia - Just name is enough. You get all the information you require from this website, starting from small words to big phrases, starting from simple topics like copywrite to computer terminologies, everything you will find there. Just type name of wordfor which you require information and information will be available to you. Generally sites give the definition of phrase in a way meaning, but wikipedia gives not just definition but complete information about that topic including relevant links. You will fill world is just a one click ahead of you. Indeed a real encyclopedia. All this information and that are without paying anything. If you are searching something and you try google.com ninety percent of time wikipedia will be listed on the first page you will find all you need, and you won’t require other search results. It is available on various languages. There is a sister project of wikipedia called Wiktionary which is an online dictionary gives meaning of words in English language and some other languages. Still your continued donations keep Wikipedia running!If you haven’t been there than don’t waste time go there now.