The term, which is nebulous and unregulated, can apply to any wine made without very few winery manipulations.
The first movie was a blockbuster, so sequels were made under the nebulous idea of “science fiction.”
But the idea that some nebulous force of will could have flipped six votes is completely extraterrestrial.
late 14c., "cloudy, misty," from Latin nebulosus "cloudy, misty, foggy, full of vapor," from nebula (see nebula). The figurative sense of "hazy, vague, formless" is first attested 1831. Astronomical sense is from 1670s. Related: Nebulously; nebulousness.