2. (Founding) A fault in a casting, produced by a bubble of air; a blowhole.

Air"i*ly (âr"*l), adv. In an airy manner; lightly; gaily; jauntily; flippantly.

Air"i*ness, n. 1. The state or quality of being airy; openness or exposure to the air; as, the airiness of a country seat.