"safe as houses" meaning in English

{
  "etymology_text": "Refererring to the investment value of property.",
  "head_templates": [
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      "args": {
        "1": "-"
      },
      "expansion": "safe as houses (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "1808, William Milton, \"Memorial\", Appendix 6A to Third Report from the Committee on the Highways of the Kingdon, House of Commons papers\nIn objection to this Coach, it is urged by the Coachmen that it looks heavy; and that they had rather break a leg now and then than drive such an ugly thing; but it regularly makes part of their sarcasm, that \"It is as safe as a house\""
        },
        {
          "ref": "1859, Kinahan Cornwallis, A panorama of the New World, volume I, page 79:",
          "text": "The owner of the weapon assured him that he was as safe as houses",
          "type": "quote"
        },
        {
          "ref": "1874, Thomas Hardy, chapter LVII, in Far from the Madding Crowd:",
          "text": "The clothes will floor us as safe as houses!",
          "type": "quote"
        },
        {
          "ref": "1895, E. M. Stooke, Not Exactly, as cited in The English Dialect Dictionary: R-S, Volume 5, Joseph Wright, editor, 1904",
          "text": "Yes'ir, I'm saved as safe as houses"
        },
        {
          "ref": "1951, Jack Common, Kiddar's luck:",
          "text": "You could see where your money was, if you owned a house; it was safe, safe as houses, the very phrase, and you couldn't say safer than that unless you brought in the Bank of England which was too big altogether for the local men and their well-warmed nest eggs",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very secure."
      ],
      "id": "en-safe_as_houses-en-adj-fWWFIwxb",
      "links": [
        [
          "secure",
          "secure"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very secure."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-safe as houses.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/En-au-safe_as_houses.ogg/En-au-safe_as_houses.ogg.mp3",
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  ],
  "word": "safe as houses"
}

{
  "etymology_text": "Refererring to the investment value of property.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "safe as houses (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English similes",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "text": "1808, William Milton, \"Memorial\", Appendix 6A to Third Report from the Committee on the Highways of the Kingdon, House of Commons papers\nIn objection to this Coach, it is urged by the Coachmen that it looks heavy; and that they had rather break a leg now and then than drive such an ugly thing; but it regularly makes part of their sarcasm, that \"It is as safe as a house\""
        },
        {
          "ref": "1859, Kinahan Cornwallis, A panorama of the New World, volume I, page 79:",
          "text": "The owner of the weapon assured him that he was as safe as houses",
          "type": "quote"
        },
        {
          "ref": "1874, Thomas Hardy, chapter LVII, in Far from the Madding Crowd:",
          "text": "The clothes will floor us as safe as houses!",
          "type": "quote"
        },
        {
          "ref": "1895, E. M. Stooke, Not Exactly, as cited in The English Dialect Dictionary: R-S, Volume 5, Joseph Wright, editor, 1904",
          "text": "Yes'ir, I'm saved as safe as houses"
        },
        {
          "ref": "1951, Jack Common, Kiddar's luck:",
          "text": "You could see where your money was, if you owned a house; it was safe, safe as houses, the very phrase, and you couldn't say safer than that unless you brought in the Bank of England which was too big altogether for the local men and their well-warmed nest eggs",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very secure."
      ],
      "links": [
        [
          "secure",
          "secure"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile) Very secure."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-safe as houses.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/97/En-au-safe_as_houses.ogg/En-au-safe_as_houses.ogg.mp3",
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  ],
  "word": "safe as houses"
}