Definition of "elf"
noun:
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A mythical, supernatural being resembling but seen as distinct from humans.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A luminous spirit presiding over nature and fertility and dwelling in the world of Álfheim (Elfland). Compare angel, nymph, fairy.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Any of the magical, humanoid, typically forest-guarding races bearing some similarities to the Norse álfar (through Tolkien's Eldar).
from Wiktionary, Creative Commons Attribution/Share-Alike License
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