From Bloomsbury Dictionary of Myth Asgard ('home of the Aesir'), in Nordic myth, was the realm of the gods, in the highest of the three levels of existence, above Midgard (home of human beings) and Niflheim (home of the Dead).
From The Columbia Encyclopedia Title applied to two distinct works in Old Icelandic. The Poetic Edda, or Elder Edda, is a collection (late 13th cent.) of 34 mythological and heroic lays, most of which were composed c.800–c.1200, probably in Iceland or W Norway.
From The Macmillan Encyclopedia In Norse mythology, the earth, which lies between Hel or Nifleheim, the land of ice, and Muspelheim, the land of fire, and is reached from Asgard (the home of the gods) by Bifrost, the rainbow bridge.
From The Hutchinson Unabridged Encyclopedia In Norse mythology, the golden hall in Odin's palace in Asgard, where he feasted with the souls of half those heroes killed in battle (valr) chosen by his female attendants, the Valkyries; the remainder celebrated in Sessrumnir with Freya, goddess of love and war.
From Bloomsbury Dictionary of Myth Yggdrasil ('ash-tree horse of Ygg'), in Nordic myth, was a giant ash-tree, the hub and support of the universe. It got its name when Ygg (Odin) hung himself for nine days and nights on it, 'riding' it in order to learn all the secrets of creation.
From Bloomsbury Dictionary of Myth Ymir ('two-in-one'), in Nordic myth, was the giant formed at the beginning of creation, when glaciers from the ice-kingdom Niflheim spread out across the void and were thawed by flames from the fire-kingdom Muspell.