Dictionary

ignis fatuus

noun ig·nis fat·u·us \ˈig-nəs-ˈfa-chə-wəs, -ˈfach-wəs\
plural ig·nes fat·ui \-ˌnēz-ˈfa-chə-ˌwī\

Definition of IGNIS FATUUS

1
:  a light that sometimes appears in the night over marshy ground and is often attributable to the combustion of gas from decomposed organic matter
2
:  a deceptive goal or hope

Origin of IGNIS FATUUS

Medieval Latin, literally, foolish fire
First Known Use: 1563

Browse

Next Word in the Dictionary: ignitePrevious Word in the Dictionary: ignimbriteAll Words Near: ignis fatuus
July 06, 2015
categorical Hear it
absolute or relating to a category
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears