"air flow" meaning in English

{
  "forms": [
    {
      "form": "air flows",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "air flow (countable and uncountable, plural air flows)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "airflow"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2021 October 6, Paul Clifton, “Network News: RSSB research exposes poor air quality on diesel trains”, in RAIL, number 941, page 15",
          "text": "We are trying to understand the air flow between exhausts and air-conditioning intakes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of airflow"
      ],
      "id": "en-air_flow-en-noun-m6StHZGz",
      "links": [
        [
          "airflow",
          "airflow#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "air flow"
}

{
  "forms": [
    {
      "form": "air flows",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "air flow (countable and uncountable, plural air flows)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "airflow"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "2021 October 6, Paul Clifton, “Network News: RSSB research exposes poor air quality on diesel trains”, in RAIL, number 941, page 15",
          "text": "We are trying to understand the air flow between exhausts and air-conditioning intakes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative spelling of airflow"
      ],
      "links": [
        [
          "airflow",
          "airflow#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "air flow"
}