"mega-ship" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mega",
        "3": "ship"
      },
      "expansion": "mega- + ship",
      "name": "pre"
    }
  ],
  "etymology_text": "mega- + ship",
  "forms": [
    {
      "form": "mega-ships",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mega-ship (plural mega-ships)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "megaship"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with mega-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Watercraft",
          "orig": "en:Watercraft",
          "parents": [
            "Nautical",
            "Vehicles",
            "Transport",
            "Machines",
            "All topics",
            "Technology",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative spelling of megaship"
      ],
      "id": "en-mega-ship-en-noun-9IHAcU-R",
      "links": [
        [
          "megaship",
          "megaship#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "mega-ship"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mega",
        "3": "ship"
      },
      "expansion": "mega- + ship",
      "name": "pre"
    }
  ],
  "etymology_text": "mega- + ship",
  "forms": [
    {
      "form": "mega-ships",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mega-ship (plural mega-ships)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "megaship"
        }
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        "English lemmas",
        "English multiword terms",
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        "en:Watercraft"
      ],
      "glosses": [
        "Alternative spelling of megaship"
      ],
      "links": [
        [
          "megaship",
          "megaship#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "mega-ship"
}