"air space" meaning in English

{
  "forms": [
    {
      "form": "air spaces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "air space (countable and uncountable, plural air spaces)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "airspace"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2005, Paul Foy, “Year after Utah mine collapse, many failures clear”, in FOXnews.com, retrieved 2010-07-30",
          "text": "At that point there was little if anything that could have been done to save the six miners—drilling ultimately determined that the tunnel where the men were presumed trapped had only a half-foot of air space left.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of airspace"
      ],
      "id": "en-air_space-en-noun-DxXBjNsh",
      "links": [
        [
          "airspace",
          "airspace#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "air space"
}

{
  "forms": [
    {
      "form": "air spaces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "air space (countable and uncountable, plural air spaces)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "airspace"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2005, Paul Foy, “Year after Utah mine collapse, many failures clear”, in FOXnews.com, retrieved 2010-07-30",
          "text": "At that point there was little if anything that could have been done to save the six miners—drilling ultimately determined that the tunnel where the men were presumed trapped had only a half-foot of air space left.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of airspace"
      ],
      "links": [
        [
          "airspace",
          "airspace#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "air space"
}