(plumbing) a mechanical sewer vent that allows air to enter into the sewage system but does not allow exhaust of sewer gases, to aid the flow of sewage by providing air behind water, where a standard vent stack to atmosphere is not possible, by drawing in interior air but keeping harmful sewer gases contained.

plural of air pocket

plural of air hole

When it comes to sexual satisfaction, penis size doesn't matter, but technique does. / (more generally) The tools you use to accomplish a goal are not as important as what you do with them.

plural of air-raid

(often attributive) Alternative form of air raid

plural of AIDS cocktail

Alternative spelling of air gun

plural of air-gun (alternative form of airguns).

A military or police unit that is equipped with aircraft