Source : Webster's Revised Unabridged Dictionary (1913)

Airy \Air"y\, a.
   1. Consisting of air; as, an airy substance; the airy parts
      of bodies.

   2. Relating or belonging to air; high in air; a["e]rial; as,
      an airy flight. ``The airy region.'' --Milton.

   3. Open to a free current of air; exposed to the air; breezy;
      as, an airy situation.

   4. Resembling air; thin; unsubstantial; not material;
      airlike. ``An airy spirit.'' --Shak.

   5. Relating to the spirit or soul; delicate; graceful; as,
      airy music.

   6. Without reality; having no solid foundation; empty;
      trifling; visionary. ``Airy fame.'' --Shak.

            Empty sound, and airy notions.        --Roscommon.

   7. Light of heart; vivacious; sprightly; flippant;
      superficial. ``Merry and airy.'' --Jer. Taylor.

   8. Having an affected manner; being in the habit of putting
      on airs; affectedly grand. [Colloq.]

   9. (Paint.) Having the light and a["e]rial tints true to
      nature. --Elmes.

Source : WordNet®

airy
     adj 1: open to or abounding in fresh air; "airy rooms" [syn: {aired}]
     2: not practical or realizable; speculative; "airy theories
        about socioeconomic improvement"; "visionary schemes for
        getting rich" [syn: {impractical}, {visionary}, {Laputan}]
     3: having little or no perceptible weight; so light as to
        resemble air; "airy gauze curtains"
     4: characterized by lightness and insubstantiality; as
        impalpable or intangible as air; "figures light and
        aeriform come unlooked for and melt away"- Thomas Carlyle;
        "aerial fancies"; "an airy apparition"; "physical rather
        than ethereal forms" [syn: {aeriform}, {aerial}, {aery}, {ethereal}]
     [also: {airiest}, {airier}]