The female version of a Deva, i.e. a female deity or goddess. Devi is considered to be the Supreme Goddess in Shaktism. Devī (is the Sanskrit root-word of Divine; its related masculine term is Deva. Devi is synonymous with Shakti, the female aspect of the divine, as conceptualized by the Shakta tradition of Hinduism. She is the female counterpart without whom the male aspect, which represents consciousness or discrimination, remains impotent and void. Goddess worship is an integral part of Hinduism.
Devi is, quintessentially, the core form of every Hindu Goddess. As the female manifestation of the supreme lord, she is also called Prakriti, as she balances out the male aspect of the divine addressed Purusha.
Devi or Durga is the supreme Being in the Shaktism tradition of Hinduism, while in the Smartha tradition, she is one of the five primary forms of God. In other Hindu traditions, Devi embodies the active energy and power of male deities (Purushas), such as Vishnu in Vaishnavism or Shiva in Shaivism. Vishnu's shakti counterpart is called Lakshmi, with Parvati being the female shakti of Shiva.