Definition of ignis fatuus in English:

ignis fatuus

nounplural noun ignes fatui/ˈiɡnēz ˈfaCHo͞oˌī/

  • 1A will-o'-the-wisp.

    ‘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?’
    mirage, hallucination, apparition, phantasm, phantom, vision, spectre, fantasy, figment of the imagination, will-o'-the-wisp, trick of the light
    1. 1.1Something deceptive or deluding.
      • ‘He chases so many ignes fatui that his thinking becomes fatuous.’
      mirage, hallucination, apparition, phantasm, phantom, vision, spectre, fantasy, figment of the imagination, will-o'-the-wisp, trick of the light

Pronunciation

ignis fatuus

/ˌiɡnəs ˈfaCHəwəs/ /ˌɪɡnəs ˈfætʃəwəs/

Origin

Mid 16th century modern Latin, literally ‘foolish fire’ (because of its erratic movement).