Wikipedia is a collaboratively edited , multilingual , free access , free encyclopedia Internet encyclopedia , supported , organized and managed by the non-profit Wikimedia Foundation. Volunteers have contributed nearly 40 million articles to Wikipedia in 301 languages worldwide , including more than 5.6 million articles in the English Wikipedia alone. Anyone can edit any article by accessing the website , which collectively fills the gap of [4] the largest and most popular general reference on the Internet. [5] [6] [7] [8] [9] In February 2014 , The New The York Times reports that Wikipedia ranks fifth globally among all websites , with about 16 billion page views per month and about 500 million unique visitors ... .