"house dog" meaning in English

{
  "etymology_templates": [
    {
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        "1": "en",
        "2": "house",
        "3": "dog"
      },
      "expansion": "house + dog",
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  ],
  "etymology_text": "From house + dog.",
  "forms": [
    {
      "form": "house dogs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "house dog (plural house dogs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Dogs",
          "orig": "en:Dogs",
          "parents": [
            "Canids",
            "Carnivores",
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            "Vertebrates",
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      "examples": [
        {
          "ref": "a. 1749 (date written), James Thomson, “Summer”, in The Seasons, London: […] A[ndrew] Millar, and sold by Thomas Cadell, […], published 1768, →OCLC:",
          "text": "The house-dog, with the vacant greyhound, lies, / Out-stretch'd, and sleepy.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A dog used to protect a house, a watchdog; (later also) a dog kept as a pet."
      ],
      "id": "en-house_dog-en-noun-0qDUUC0~",
      "links": [
        [
          "dog",
          "dog"
        ],
        [
          "protect",
          "protect"
        ],
        [
          "house",
          "house"
        ],
        [
          "watchdog",
          "watchdog"
        ],
        [
          "pet",
          "pet"
        ]
      ],
      "synonyms": [
        {
          "word": "watchdog"
        }
      ]
    }
  ],
  "word": "house dog"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "house",
        "3": "dog"
      },
      "expansion": "house + dog",
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    }
  ],
  "etymology_text": "From house + dog.",
  "forms": [
    {
      "form": "house dogs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "house dog (plural house dogs)",
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  "lang_code": "en",
  "pos": "noun",
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        {
          "ref": "a. 1749 (date written), James Thomson, “Summer”, in The Seasons, London: […] A[ndrew] Millar, and sold by Thomas Cadell, […], published 1768, →OCLC:",
          "text": "The house-dog, with the vacant greyhound, lies, / Out-stretch'd, and sleepy.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A dog used to protect a house, a watchdog; (later also) a dog kept as a pet."
      ],
      "links": [
        [
          "dog",
          "dog"
        ],
        [
          "protect",
          "protect"
        ],
        [
          "house",
          "house"
        ],
        [
          "watchdog",
          "watchdog"
        ],
        [
          "pet",
          "pet"
        ]
      ],
      "synonyms": [
        {
          "word": "watchdog"
        }
      ]
    }
  ],
  "word": "house dog"
}