An Encyclopedia is a compendium of Knowledge. An encyclopedia has many articles on many topics or subjects, alternatively many different branches of one subject. An encyclopedia can be in Book form like Encyclopaedia Britannica or online like Wikipedia. Encyclopedias in book form are typically arranged Alphabetically.  
Is Liberapedia an encyclopedia? Well we cover many aspects of Politics and Liberalism and we have general knowledge articles. We're not as big as a regular encyclopedia but we hope we can help you learn.