Lexical Definition

‎ἀήρ‎ aḗr (ah-ayr') air ^G:N-M
from (to breathe unconsciously, i.e. respire

air.

• by analogy, to blow)
• "air" (as naturally circumambient)

Abbott-Smith

ἀήρ, ἀέρος, ὁ, [in LXX: II Ki 22:12 (= Ps 17 (18):11* שׁחק), Wi8;]
in Hom., Hes., the lower air which surrounds the earth, as opp. to the purer αἰθήρ of the higher regions; generally, air (MM, VGT, s.v.): Ac 22:23, I Th 4:17, Re 9:2 16:17; of the air as the realm of demons, Eph 2:2; ἀ. δέρειν, of striving to no purpose, I Co 9:26; εἰς ἀ. λαλεῖν, of speaking without effect, not being understood, I Co 14:9.†

Abbott-Smith References

Liddell-Scott-Jones

ἀήρ, ἀέρος,

[ἀήρ, ἠέρος">Refs 8th c.BC+]; Ionic dialect nominative ἠήρ [Refs 5th c.BC+]; Aeolic dialect αὐήρ [Refs 5th c.BC+]; Doric dialect ἀβήρ (i.e. ἀϜήρ) [Refs 8th c.BC+] always mist, haze, not (as [Refs 3rd c.BC+] lower air (opposed to αἰθήρ, which see); [ἐλάτη] μακροτάτη πεφυυῖα δι᾽ ἠέρος αἰθέρ᾽ ἵκανεν[Refs 8th c.BC+]; rare in Prose, [Refs 5th c.BC+]

__2 later, generally, air, Anaxim.1, [Refs 5th c.BC+]; πρὸς τὸν ἀέρα διατρίβειν in the open air, [NT+5th c.BC+]; climates, [Refs 5th c.BC+]; of mephitic exhalations, [Refs 1st c.BC+]
__3 personified, ὦ δέσποτ᾽ ἄναξ ἀμέτρητ᾽ Ἀ.[Refs 5th c.BC+]
__II hot-air room in baths, [Refs 2nd c.AD+]
__II.2 volume, [Refs 2nd c.BC+]
__III a pigment, sky-blue or grey, [Refs]. [ᾱ, except in [Refs 4th c.BC+]

_{LSJ Scripture Refs: 1Cor.9.26}