A fanciful notion; an unrealistic or ludicrous concept.
Something imaginary or lacking substance.
Small fragments of dust-like material found in space; specifically, a type of cosmic dust that formed from cooling gases ejected from presolar stars, which was then incorporated into the cloud from which the Solar System condensed.
An imaginary magic dust or powder that, when in one's eyes, supposedly causes one to view a person or thing favourably, even though this might not actually be warranted.
An imaginary magic dust or powder supposedly able to give one charisma or other positive qualities; hence, charisma or glamour, especially that possessed by a celebrity.