1.  An incredibly complex version of the Goddess revered in India and by Tantrics. The name refers to the color black, as in the depths of space. Therefore She is considered the "dark one" and is shown with black or dark blue skin. The word Kali is associated with the concept of time. Therefore, she is also a feminine aspect of time. She is usually shown as being terrifying, but she is also considered to be a mother (Kali Ma). This seeming contradition indicates that Kali is also the mother who fights evil, destroys the false aspects of ego that separate us from reality, and spurs transformation. 

2.  One (for some, the supreme) manifestation of the divine feminine in Hinduism.