WordWeb Online

1. Filled with vapor
   - miasmal, miasmic, vaporous, vapourous [Brit, non-standard], vapoury [Brit, Cdn]
    
2. Resembling or characteristic of vapor
   "vapory clouds"
   - vaporific, vapourific [Brit, Cdn], vaporish [US], vapourish [Brit, Cdn], vaporous, vapourous [Brit, non-standard], vapoury [Brit, Cdn]
    
3. So thin as to transmit light
   "a hat with a vapory veil"
   - diaphanous, filmy, gauzy, gauze-like, gossamer, see-through, sheer, transparent, vaporous, vapourous [Brit, non-standard], cobwebby, vapoury [Brit, Cdn]
    
4. [archaic] Splenetic; peevish
   - vapoury [Brit, Cdn, archaic]

See also: cloudy, gaseous, thin