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airy

adjective, air·i·er, air·i·est.

open to a free current of fresh air; breezy: airy rooms.
consisting of or having the character of air; immaterial: airy phantoms.
light in appearance; thin: airy garments.
light in manner; sprightly; lively: airy songs.
light in movement; graceful; delicate: an airy step.
light as air; unsubstantial; unreal; imaginary: airy dreams.
visionary; speculative.
performed in the air; aerial.
lofty; high in the air.
putting on airs; affected; snobbish: an airy debutante posing for society photographers.

adjective airier or airiest

abounding in fresh air
spacious or uncluttered
nonchalant; superficial
visionary; fancifulairy promises; airy plans
of or relating to air
weightless and insubstantialan airy gossamer
light and graceful in movement
having no material substanceairy spirits
high up in the air; lofty
performed in the air; aerial

noun

Sir George Biddell . 1801–92, British astronomer, noted for his estimate of the earth’s density from gravity measurements in mines; astronomer royal (1835–81)

adj.

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).