Definition of ignis fatuus in English:

ignis fatuus

Line breaks: ignis fat¦uus
Pronunciation: /ˌɪgnɪs ˈfatjʊəs

noun (plural ignes fatui /ˌɪgniːz ˈfatjʊʌɪ, ˌɪgneɪz, ˈfatjʊiː/)

  • A will-o'-the-wisp.
    More example sentences
    • But it's impossible to describe these paintings, also because they hit your soul like burning arrows and recall the sad and reddish dance of the ignis fatuuses.
    • How is the gas of ignis fatui ignited on bogs and meadows?


mid 16th century: modern Latin, literally 'foolish fire' (because of its erratic movement).

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space