"ἀήρ" meaning in Grego Antigo

{
  "categories": [
    {
      "kind": "other",
      "name": "!Entrada (Grego Antigo)",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Substantivo (Grego Antigo)",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Grego Antigo",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Substantivo",
  "senses": [
    {
      "glosses": [
        "ar."
      ],
      "id": "pt-ἀήρ-grc-noun-8iG093Wm"
    }
  ],
  "word": "ἀήρ"
}

{
  "categories": [
    "!Entrada (Grego Antigo)",
    "Substantivo (Grego Antigo)"
  ],
  "lang": "Grego Antigo",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Substantivo",
  "senses": [
    {
      "glosses": [
        "ar."
      ]
    }
  ],
  "word": "ἀήρ"
}