the mind > mental capacity > perception or cognition > faculty of imagination > fancy or fantastic notion > [noun] > product of > vain imaginings (4)
figurative. plural. Windy speculations; vapourings. Obsolete. rare.
That which is dreamed or imagined; (also) the action or an act of dreaming; esp. delusion, fantasy.
figurative in plural. Vain imaginations.
That which is dreamed or imagined; esp. delusion, false belief.