"crush barrier" meaning in English

{
  "forms": [
    {
      "form": "crush barriers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crush barrier (plural crush barriers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A fence or barrier that divides the space occupied by a large crowd in order to prevent people from being crushed."
      ],
      "id": "en-crush_barrier-en-noun-L7qGEFK4",
      "links": [
        [
          "fence",
          "fence"
        ],
        [
          "barrier",
          "barrier"
        ]
      ],
      "raw_glosses": [
        "(UK) A fence or barrier that divides the space occupied by a large crowd in order to prevent people from being crushed."
      ],
      "related": [
        {
          "word": "crowd control barrier"
        },
        {
          "word": "police barrier"
        },
        {
          "word": "security barrier"
        }
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "crush barrier"
}

{
  "forms": [
    {
      "form": "crush barriers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crush barrier (plural crush barriers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "crowd control barrier"
    },
    {
      "word": "police barrier"
    },
    {
      "word": "security barrier"
    }
  ],
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A fence or barrier that divides the space occupied by a large crowd in order to prevent people from being crushed."
      ],
      "links": [
        [
          "fence",
          "fence"
        ],
        [
          "barrier",
          "barrier"
        ]
      ],
      "raw_glosses": [
        "(UK) A fence or barrier that divides the space occupied by a large crowd in order to prevent people from being crushed."
      ],
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "crush barrier"
}