vaporous

adjective7

1. •
   Of or relating to vapour; also, having the characteristics or consistency of vapour.

   • Hovv can darknesse be called a Masse? &c. No it cannot. Nor a thin vaporous matter neither. — 1651
2. •
   (figurative) Lacking depth or substance; insubstantial, thoughtless, vague.

   • So vvhosoeuer shall entertaine high and vapourous imaginations, in steede of a laborious and sober inquiry of truth shall beget hopes and Beliefes of strange and impossible shapes. — 1605
3. •
   (figurative) Of clothes or fabric: thin and translucent; filmy, gauzy.

   • [A]irily-attired ladies were lounging upon the chairs in the gardens of the Tuileries; only the most fragile and vaporous bonnets were to be seen in the Bois de Boulogne; […] — 1863
4. •
   Of a place: filled with vapour; foggy, misty.

   • O hatefull, vaporous, and foggy night, / Since thou art guilty of my curelesse crime: / Muster thy mists to meete the Easterne light, / Make vvar against proportion'd course of time. — 1594
5. •
   Of a thing: covered or hidden by vapour, fog, or mist.
6. •
   Breathing out or giving off vapour.
7. •
   Feeling melancholy; experiencing the vapors.