All the contents of Wikipedia are under under the copyleft licenses Creative Commons Attribution-ShareAlike 3.0 Unported License (CC BY-SA) and GNU Free Documentation License (GFDL). Both of these licenses allow reuse and modification, but reserve the right to attribution. Wikipedia content can be copied, modified, and redistributed if and only if the copied version is made available on the same terms to others and acknowledgment of the authors of the Wikipedia article used is included (a link back to the article is generally thought to satisfy the attribution requirement).
Source -
https://www.quora.com/Can-I-copy-Wik...-to-my-website