Fairies (also written faeries) are "little folk" or "wee folk," mystical beings, humanoid in appearance but usually able to fly. In fairy lore, sometimes fairies are portrayed with wings; other times they just fly "magically." Fairies are of various characters, some good, some not so good. They are often tricksters, likely to fool human beings, but they are equally capable of assisting those in need, especially through their ability to use magic.
Fairies have been likened to spirits or angels, especially since they seem to have supernatural abilities transcending the merely physical realm. Fairies appear in the folktales of Europe, Celtic cultures in particular, and of course give their name to the popular stories for children - "fairy tales."
Image of Fairy from Wikimedia Commons.