1.VerbTo expose to air; to leave open or spread out, as to allow odor or moisture to dissipate.
"If you air out your sleeping bag after you use it, it will smell better the next time you get in.; If you air it out after you use it, it will smell better the next time you get in."
2.VerbTo discuss in the open; to address an issue or conflict that has long been avoided.
"She's been nursing a grievance for a while now. It's time to air it out."
3.VerbTo shoot up a location, particularly inside a building.
4.VerbTo throw passes, especially long and high passes.