"available seat-mile" meaning in English

{
  "forms": [
    {
      "form": "available seat-miles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "available seat-mile (plural available seat-miles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Aviation",
          "orig": "en:Aviation",
          "parents": [
            "Aeronautics",
            "Transport",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A measure of an airline flight's passenger carrying capacity, equal to the number of seats onboard an aircraft multiplied by the distance flown in miles. Seats that are not available for sale to revenue-paying passengers (e.g., seats reserved for crew rest, etc.) are excluded from this calculation."
      ],
      "id": "en-available_seat-mile-en-noun-QjPRG0k~",
      "links": [
        [
          "aviation",
          "aviation"
        ],
        [
          "airline",
          "airline"
        ],
        [
          "capacity",
          "capacity"
        ],
        [
          "revenue",
          "revenue"
        ]
      ],
      "raw_glosses": [
        "(aviation) A measure of an airline flight's passenger carrying capacity, equal to the number of seats onboard an aircraft multiplied by the distance flown in miles. Seats that are not available for sale to revenue-paying passengers (e.g., seats reserved for crew rest, etc.) are excluded from this calculation."
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "available seat-mile"
}

{
  "forms": [
    {
      "form": "available seat-miles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "available seat-mile (plural available seat-miles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Aviation",
        "en:Units of measure"
      ],
      "glosses": [
        "A measure of an airline flight's passenger carrying capacity, equal to the number of seats onboard an aircraft multiplied by the distance flown in miles. Seats that are not available for sale to revenue-paying passengers (e.g., seats reserved for crew rest, etc.) are excluded from this calculation."
      ],
      "links": [
        [
          "aviation",
          "aviation"
        ],
        [
          "airline",
          "airline"
        ],
        [
          "capacity",
          "capacity"
        ],
        [
          "revenue",
          "revenue"
        ]
      ],
      "raw_glosses": [
        "(aviation) A measure of an airline flight's passenger carrying capacity, equal to the number of seats onboard an aircraft multiplied by the distance flown in miles. Seats that are not available for sale to revenue-paying passengers (e.g., seats reserved for crew rest, etc.) are excluded from this calculation."
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "available seat-mile"
}