(engineering) Pertaining to direct air capture technology; the technology of directly extracting specific gases from the ambient atmosphere.

Alternative spelling of air raid siren

plural of air-raid siren

Alternative form of vanish into thin air

(idiomatic) To disappear in a mysterious way.

Third-person singular simple present indicative form of disappear into thin air

simple past tense and past participle of disappear into thin air

present participle of disappear into thin air

simple past tense and past participle of turn the air blue

present participle of turn the air blue