the mind > mental capacity > perception or cognition > faculty of imagination > fancy or fantastic notion > deceptive fancy or illusion > [noun] > condition of being deluded (2)
The fact or condition of being deceived or deluded by appearances, or an instance of this; a mental state involving the attribution of reality to…
The mental condition of being deceived or mistaken, or of entertaining unfounded notions; with a and plural, an idea or belief to which nothing…