WordWeb Online

1. Open to or abounding in fresh air
   "airy rooms";
   - aired
    
2. Not practical or realizable; speculative
   "airy theories about socioeconomic improvement";
   - impractical, visionary, Laputan, windy
    
3. Having little or no perceptible weight; so light as to resemble air
   "airy gauze curtains"
    
4. Characterized by lightness and insubstantiality; as impalpable or intangible as air
   "an airy apparition";
   - aeriform, aerial, aery, ethereal, etherial

Derived forms: airiest, airier

See also: insubstantial, light, unreal, unsubstantial, utopian, ventilated

Encyclopedia: Airy, George Biddell, Sir