Siddhidhatri is the ninth and final among the Navadurga aspects of the Hindu mother goddess Mahadevi. The meaning of her name is as follows: Siddhi means supernatural power or meditative ability, and Dhatri means giver or awarder. She is worshipped on the ninth day of Navaratri ; she fulfills all the divine aspirations. It is believed that one side of Lord Shiva’s body is that of Goddess Siddhidatri. Therefore, he is also known by the name of Ardhanarishwara. According to Vedic scriptures, Lord Shiva attained all the siddhis by worshiping this Goddess.

Navadurga, also spelled Navdurga and Navadurgas, are nine manifestations and forms of Durga in Hinduism, especially worshipped during Navaratri and Durga Puja. They are often considered collectively as a single deity, mainly among the followers of Shaktism and Shaivism sect of Hinduism.