"a mezz’aria" meaning in Italien

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions adverbiales en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Italien",
      "orig": "italien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de a, mezz’ et aria."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en italien de l’aéronautique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "En plein vol, au cours de l’évolution aérienne d’un avion, d’un oiseau."
      ],
      "id": "fr-a_mezz’aria-it-adv-AZ79dYT2",
      "topics": [
        "aeronautics"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en italien du sport",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en italien",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "En plein vol, lorsque la balle ne touche pas le sol."
      ],
      "id": "fr-a_mezz’aria-it-adv-qo9EnzUV",
      "topics": [
        "sports"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "a mezz’aria"
}

{
  "categories": [
    "Compositions en italien",
    "Locutions adverbiales en italien",
    "italien"
  ],
  "etymology_texts": [
    "Composé de a, mezz’ et aria."
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "senses": [
    {
      "categories": [
        "Lexique en italien de l’aéronautique"
      ],
      "glosses": [
        "En plein vol, au cours de l’évolution aérienne d’un avion, d’un oiseau."
      ],
      "topics": [
        "aeronautics"
      ]
    },
    {
      "categories": [
        "Lexique en italien du sport",
        "Wiktionnaire:Exemples manquants en italien"
      ],
      "glosses": [
        "En plein vol, lorsque la balle ne touche pas le sol."
      ],
      "topics": [
        "sports"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "a mezz’aria"
}