Wik·i·pe·di·a /ˌwɪkɪˈpiːdiə/ BrE AmE trademark
an ↑ encyclopedia on the Internet which is free to use and whose articles are written by ↑ volunteer s (=people who are not paid) . Wikipedia articles are available in many languages and most can be ↑ edit ed by anyone. Unlike paper encyclopedias, the articles in Wikipedia are constantly ↑ update d . Sometimes the encyclopedia is criticized for being ↑ biased or inaccurate.