Definition of phantasm in English:

phantasm

noun

literary
  • 1An illusion, apparition, or ghost.

    ‘the cart seemed to glide like a terrible phantasm’
    • ‘They thought He was a ghost, a phantasm, an apparition, a spirit, anything except their Master.’
    • ‘Exposed to the light, the monk's inner demons and the phantasms of his dreams would no longer seem quite as frightening or threatening.’
    • ‘The flickering shadows and darting phantasms on the walls reminded me exactly of some sights I once encountered in a cave in Spain, filled with art.’
    • ‘‘It was only a terrible phantasm trying to take root in my imagination,’ he reassured himself.’
    • ‘Six was a phantom - a ghost, a ghoul, a phantasm, a hallucination, a side effect of Stray's medicine, some unknown effect of acid, something of that sort.’
    ghost, phantom, apparition, spirit, wraith, shadow, presence, illusion
    View synonyms
    1. 1.1archaic An illusory likeness of something.
      ‘every phantasm of a hope was quickly nullified’

Origin

Middle English (in the sense ‘deceptive appearance’): from Old French fantasme, via Latin from Greek phantasma, from phantazein make visible, from phainein to show. The change from f- to ph- in the 16th century was influenced by the Latin spelling.

Pronunciation:

phantasm

/ˈfantaz(ə)m/