A race of small, flying humanoids in fantasy fiction and role-playing games. Pixies are notorious troublemakers and like to play tricks and pranks on others. Pixies often have magical abilities such as turning invisible or creating illusions of sight and sound.
In 3rd Edition D&D Pixies are a sub-section of fey, who are reclusive and good creatures who try to fight evil.
Some information taken from the 3rd Edition D&D Monster Manual, published by Wizards of the Coast.