D defs.my
Entry 2 senses Webster, 1913

Phantasm

/fănˌ-tăz'-əm/ · Phan·tasm · IPA /ˈfæntæzəm/
01 n. An image formed by the mind, and supposed to be real or material; a shadowy or airy appearance; sometimes, an optical illusion; a phantom; …
  1. 1.
    An image formed by the mind, and supposed to be real or material; a shadowy or airy appearance; sometimes, an optical illusion; a phantom; a dream.
    “They be but phantasms or apparitions.” Sir W. Raleigh.
  2. 2.
    A mental image or representation of a real object; a fancy; a notion.
    “Figures or little features, of which the description had produced in you no phantasm or expectation.” Jer. Taylor.