The nest of an eagle, or other bird of prey, which is constructed in a high place: The ornithologist was able to see the eagle's aerie on the side of the mountain.

1. Well ventilated: The castle halls were large and airy.
2. Jaunty, sprightly, lively, frolicsome: The little goats hopped around in an airy way.

"The band played an airy tune."

3. Imaginary, fanciful, dreamy, ethereal, unrealistic: The daydreamer's head was full of airy thoughts.

So strange as to inspire a feeling of fear; uneasy because of superstitious fear; ominous, ghostly, spooky: Seeing the old graveyard at night usually gave any visitors there an eerie (or eery) feeling.