Dictionary & Thesaurus

will-o'-the-wisp

1.	(noun) an illusion that misleads
	Synonyms: ignis fatuus
	Related Words: fancy, fantasy, illusion, phantasy

2.	(noun) a pale light sometimes seen at night over marshy ground
	Synonyms: friar's lantern, ignis fatuus, jack-o'-lantern
	Related Words: light, visible light, visible radiation