Definitions
1.nounA luminous spirit presiding over nature and fertility and dwelling in the world of Álfheim (Elfland). Compare angel, nymph, fairy.
2.nounAny from a race of mythical, supernatural beings resembling but seen as distinct from human beings. They are usually delicate-featured and skilled in magic or spellcrafting; sometimes depicted as clashing with dwarves, especially in modern fantasy literature.
3.nounAny of the magical, typically forest-guarding races bearing some similarities to the Norse álfar (through Tolkien's Eldar).
4.nounA very diminutive person; a dwarf.
5.nounThe bluefish (Pomatomus saltatrix).
6.nounAn upper atmospheric optical phenomenon associated with thunderstorms, rapidly expanding disk-shaped regions of luminosity, lasting less than a thousandth of a second, which occur high above energetic cloud-to-ground lightning of positive or negative polarity