Dictionary & Thesaurus

ignis fatuus

1.	(noun) an illusion that misleads
	Synonyms: will-o'-the-wisp
	Related Words: fancy, fantasy, illusion, phantasy

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