late 14c., "of the air, made of air," from air (n.1) + -y (2). Meaning "breezy" is attested from 1590s; that of "lively" is from 1640s. Sense of "vain, unsubstantial" is from 1580s. Disparaging airy-fairy is attested from 1920 (earlier in a sense of "delicate or light as a fairy," which is how Tennyson used it in 1830).
1. Her house is light and airy, crisp and clean.
2. Giving them an airy wave of his hand, the Commander sailed past.
3. The bathroom has a light and airy feel.
4. The office was light and airy.
5. Mark followed the teacher into a large airy room.