Quick definitions from WordNet (airy)
▸ adjective: not practical or realizable; speculative ("Airy theories about socioeconomic improvement")
▸ adjective: having little or no perceptible weight; so light as to resemble air ("Airy gauze curtains")
▸ adjective: open to or abounding in fresh air ("Airy rooms")
▸ adjective: characterized by lightness and insubstantiality; as impalpable or intangible as air ("An airy apparition")
▸ Also see airy
▸ adjective: not practical or realizable; speculative ("Airy theories about socioeconomic improvement")
▸ adjective: having little or no perceptible weight; so light as to resemble air ("Airy gauze curtains")
▸ adjective: open to or abounding in fresh air ("Airy rooms")
▸ adjective: characterized by lightness and insubstantiality; as impalpable or intangible as air ("An airy apparition")
▸ Also see airy