Burka refers to an opaque veil worn by Muslim women covering the whole face except for the eyes (usually there are holes for the eyes or mesh in the eyes area).
Moreover, a full Burka which is often made with silk or other light synthetic materials covers the entire body including the eyes worn by Muslim women, particularly in India and Pakistan, and other Middle Eastern countries. Burkas are worn by very conservative women in Afghanistan. However, in Turkey it is oulawed to wear a Burka.
Burka is also spelled Burqa and it is also known as Chadari.