In Ancient Egyptian religion, Tefnut, transliterated tfnt (tefenet) is a goddess of moisture, moist air, dew and rain. She is the sister and consort of the air god Shu and the mother of Geb and Nut.

Tefnut is a daughter of the solar god Atum-Ra. Married to her brother, Shu, she is mother of Nut, the sky and Geb, the earth. Tefnut's grandchildren were Osiris, Isis, Set and Nephthys. Alongside her father, brother, children and grandchildren, she is a member of the Ennead of Heliopolis.

There are a number of variants to the myth of the creation of Tefnut and her twin brother Shu. In all versions, Tefnut is the product of parthenogenesis, and all involve some variety of bodily fluid.

Tefnut is a leonine deity, and appears as human with a lioness head when depicted as part of the Great Ennead of Heliopolis. The other frequent depiction is as a lioness, but Tefnut can also be depicted as fully human. In her fully or semi anthropomorphic form, she is depicted wearing a wig, topped either with a uraeus serpent, or a uraeus and solar disk, and she is sometimes depicted as a lion headed serpent. Her face is sometimes used in a double headed form with that of her brother Shu on collar counterpoises.

When depicted as a woman with a lion´s head, she can be distinguished from Sekhmet as Sekhmet's ears are rounded while Tefnut´s are pointed