I've also seen some anery motleys referred to as pastel for their bright corals/pinks that come in as they age. Anery mots can very much resemble ghosts in lightness and may be impossible to tell from ghost motleys without known parental genotypes or test crossing.
In my opinion, it's a description of a coloration moreso than a specific genotype. Not everyone's definition is the same, so if you're buying one be sure to ask the seller/breeder in advance before purchase if genotype is important to you.