The Morrígan or Mórrígan, also known as Morrígu, is a figure from Irish mythology. The name is Mór-Ríoghain in Modern Irish, and it has been translated as "great queen" or "phantom queen".
The Morrígan is mainly associated with war and fate, especially with foretelling doom, death, or victory in battle. In this role she often appears as a crow, the badb. She incites warriors to battle and can help bring about victory over their enemies. The Morrígan encourages warriors to do brave deeds, strikes fear into their enemies, and is portrayed washing the bloodstained clothes of those fated to die.
She is most frequently seen as a goddess of battle and war and has also been seen as a manifestation of the earth and sovereignty goddess, chiefly representing the goddess's role as guardian of the territory and its people.
The Morrígan is often described as a trio of individuals, all sisters, called "the three Morrígna". Membership of the triad varies; sometimes it is given as Badb, Macha,and Nemain, while elsewhere it is given as Badb, Macha, and Anand (the latter is given as another name for the Morrígan). It is believed that these were all names for the same goddess. The three Morrígna are also named as sisters of the three land goddesses Ériu, Banba, and Fódla.
She is associated with the banshee of later folklore.