Definition of "Airy" :

adjective: characterized by lightness and insubstantiality; as impalpable or intangible as air

"An airy apparition."

adjective: having little or no perceptible weight; so light as to resemble air

"Airy gauze curtains."

adjective: not practical or realizable; speculative

"Airy theories about socioeconomic improvement."

adjective: open to or abounding in fresh air

"Airy rooms."