Noun
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.
A mental image or representation of a real object; a fancy; a notion.
Source: Webster's dictionaryAlthough the whole of this life were said to be nothing but a dream and the physical world nothing but a phantasm, I should call this dream or phantasm real enough, if, using reason well, we were never deceived by it. Gottfried Leibniz
I invoked Aiwaz, was shown a phantasm of Baphomet, and suddenly determined to recognize this for Him! Aleister Crowley
a ghostly apparition at midnight Source: Internet
we were unprepared for the apparition that confronted us Source: Internet
Andrea Beaumont was a romantic interest and anti-hero in the beloved Mask of the Phantasm. Source: Internet
Batman/Catwoman writer Tom King has shared haunting preview art featuring the Phantasm by artist Clay Mann ahead of the series' December launch. Source: Internet