air out verb4 •To 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. •To 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. •(slang) To throw passes, especially long and high passes. •To shoot up a location, particularly inside a building. formsaired out · airing out · airs out