- a large planet-like object discovered in 2003, orbiting the sun but considerably beyond Pluto
C21: after the Inuit goddess of the ocean
Examples from the Web for sedna
Sedna is the mistress of one of the countries to which the souls go after death.
Meantime the storm subsided, for the fulmars thought Sedna was drowned.
They have since lived in the land of Adlivun, of which Sedna is the mistress.
Sedna could not long resist such wooing and they went together over the vast sea.
He killed the fulmar, took Sedna into his boat, and they quickly left the country which had brought so much sorrow to Sedna.