1.Definition: characterized by lightness and insubstantiality; as impalpable or intangible as air
"An airy apparition"
2.Definition: having little or no perceptible weight; so light as to resemble air
"Airy gauze curtains"
3.Definition: not practical or realizable; speculative
"Airy theories about socioeconomic improvement"
4.Definition: open to or abounding in fresh air