STRONGS NT 109: ἀήρ
ἀήρ, ἀέρος, ὁ, (ἄημι, ἄω, [cf. ἄνεμος, at the beginning]), the air (particularly the lower and denser, as distinguished from the higher and rarer ὁ αἰθήρ, cf. Homer, Iliad 14, 288), the atmospheric region: Acts 22:23; 1 Thessalonians 4:17;
The KJV translates Strong's G109...