2. When you are speeding down the road and there is a sudden dip that seems to leave you suspended in mid-air for a few seconds, causing that fluttering sensation in your stomach.
3. Jumping so high while playing basketball that you seem to hang suspended, like Michael "Air" Jordan, before coming back down to earth.
Def 3: I don't know if it's his new kicks, or that basketball camp he went to this summer, but Dwayne gets some serious air on his jump shot now.