"cellar-door" meaning in English

{
  "forms": [
    {
      "form": "cellar-doors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cellar-door (plural cellar-doors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cellar door"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              4,
              15
            ]
          ],
          "ref": "1843 December 19, Charles Dickens, “Stave I. Marley’s Ghost.”, in A Christmas Carol. […], London: Chapman & Hall, […], →OCLC, pages 24–25:",
          "text": "The cellar-door flew open with a booming sound, and then he heard the noise much louder, on the floors below; then coming up the stairs; then coming straight towards the door.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of cellar door."
      ],
      "id": "en-cellar-door-en-noun-yIcYT7yI",
      "links": [
        [
          "cellar door",
          "cellar door#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "cellar-door"
}

{
  "forms": [
    {
      "form": "cellar-doors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cellar-door (plural cellar-doors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cellar door"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              4,
              15
            ]
          ],
          "ref": "1843 December 19, Charles Dickens, “Stave I. Marley’s Ghost.”, in A Christmas Carol. […], London: Chapman & Hall, […], →OCLC, pages 24–25:",
          "text": "The cellar-door flew open with a booming sound, and then he heard the noise much louder, on the floors below; then coming up the stairs; then coming straight towards the door.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of cellar door."
      ],
      "links": [
        [
          "cellar door",
          "cellar door#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "cellar-door"
}