"flat-chestedness" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "flat-chested",
        "3": "ness"
      },
      "expansion": "flat-chested + -ness",
      "name": "suffix"
    }
  ],
  "etymology_text": "From flat-chested + -ness.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flat-chestedness (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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 suffixed with -ness",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
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          "kind": "other",
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          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Flat-chestedness was a big problem when I was in school.",
          "type": "example"
        }
      ],
      "glosses": [
        "The state of being flat-chested; the state of having small breasts."
      ],
      "id": "en-flat-chestedness-en-noun-9eooJfr3",
      "links": [
        [
          "flat-chested",
          "flat-chested"
        ],
        [
          "breast",
          "breast"
        ]
      ],
      "synonyms": [
        {
          "word": "flatchestedness"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "flat-chestedness"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "flat-chested",
        "3": "ness"
      },
      "expansion": "flat-chested + -ness",
      "name": "suffix"
    }
  ],
  "etymology_text": "From flat-chested + -ness.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "flat-chestedness (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms suffixed with -ness",
        "English terms with usage examples",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Flat-chestedness was a big problem when I was in school.",
          "type": "example"
        }
      ],
      "glosses": [
        "The state of being flat-chested; the state of having small breasts."
      ],
      "links": [
        [
          "flat-chested",
          "flat-chested"
        ],
        [
          "breast",
          "breast"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "flatchestedness"
    }
  ],
  "word": "flat-chestedness"
}