"boulder holder" meaning in English

{
  "forms": [
    {
      "form": "boulder holders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "boulder holder (plural boulder holders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "a large bra",
          "word": "over-the-shoulder boulder holder"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English rhyming compounds",
          "parents": [
            "Rhyming compounds",
            "Compound terms",
            "Rhyming phrases",
            "Terms by etymology",
            "Phrases",
            "Lemmas",
            "Multiword terms"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of over-the-shoulder boulder holder (“a large bra”)"
      ],
      "id": "en-boulder_holder-en-noun-u9M33j2i",
      "links": [
        [
          "over-the-shoulder boulder holder",
          "over-the-shoulder boulder holder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "boulder holder"
}

{
  "forms": [
    {
      "form": "boulder holders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "boulder holder (plural boulder holders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "a large bra",
          "word": "over-the-shoulder boulder holder"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English rhyming compounds"
      ],
      "glosses": [
        "Alternative form of over-the-shoulder boulder holder (“a large bra”)"
      ],
      "links": [
        [
          "over-the-shoulder boulder holder",
          "over-the-shoulder boulder holder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "boulder holder"
}