"Rotto" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Rottnest",
        "3": "o",
        "gloss2": "diminutive suffix"
      },
      "expansion": "Rottnest + -o (“diminutive suffix”)",
      "name": "suffix"
    }
  ],
  "etymology_text": "Rottnest + -o (“diminutive suffix”)",
  "head_templates": [
    {
      "args": {},
      "expansion": "Rotto",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Australian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -o",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Rottnest Island, a small island off the coast of Western Australia."
      ],
      "id": "en-Rotto-en-name-xHixJVee",
      "links": [
        [
          "Western Australia",
          "Western Australia"
        ]
      ],
      "raw_glosses": [
        "(Australia, slang) Rottnest Island, a small island off the coast of Western Australia."
      ],
      "tags": [
        "Australia",
        "slang"
      ]
    }
  ],
  "word": "Rotto"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Rottnest",
        "3": "o",
        "gloss2": "diminutive suffix"
      },
      "expansion": "Rottnest + -o (“diminutive suffix”)",
      "name": "suffix"
    }
  ],
  "etymology_text": "Rottnest + -o (“diminutive suffix”)",
  "head_templates": [
    {
      "args": {},
      "expansion": "Rotto",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Australian English",
        "English entries with incorrect language header",
        "English lemmas",
        "English proper nouns",
        "English slang",
        "English terms suffixed with -o",
        "English uncountable nouns"
      ],
      "glosses": [
        "Rottnest Island, a small island off the coast of Western Australia."
      ],
      "links": [
        [
          "Western Australia",
          "Western Australia"
        ]
      ],
      "raw_glosses": [
        "(Australia, slang) Rottnest Island, a small island off the coast of Western Australia."
      ],
      "tags": [
        "Australia",
        "slang"
      ]
    }
  ],
  "word": "Rotto"
}