"oysterman's stopper" meaning in English

{
  "etymology_text": "* One of many knots invented by Clifford Warren Ashley who named this knot as it was similar to a knot used by oyster fishermen.",
  "forms": [
    {
      "form": "oysterman's stoppers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oysterman's stopper (plural oysterman's stoppers)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Knots",
          "orig": "en:Knots",
          "parents": [
            "Miscellaneous",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A type of knot used to provide a symmetrical stop at the end of a rope to prevent it from pulling through an eyelet or other fixed opening."
      ],
      "id": "en-oysterman's_stopper-en-noun-2z2pw5Ft",
      "links": [
        [
          "knot",
          "knot"
        ],
        [
          "eyelet",
          "eyelet"
        ]
      ],
      "synonyms": [
        {
          "sense": "knot",
          "word": "Ashley's stopper knot"
        }
      ]
    }
  ],
  "word": "oysterman's stopper"
}

{
  "etymology_text": "* One of many knots invented by Clifford Warren Ashley who named this knot as it was similar to a knot used by oyster fishermen.",
  "forms": [
    {
      "form": "oysterman's stoppers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oysterman's stopper (plural oysterman's stoppers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Knots"
      ],
      "glosses": [
        "A type of knot used to provide a symmetrical stop at the end of a rope to prevent it from pulling through an eyelet or other fixed opening."
      ],
      "links": [
        [
          "knot",
          "knot"
        ],
        [
          "eyelet",
          "eyelet"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "knot",
      "word": "Ashley's stopper knot"
    }
  ],
  "word": "oysterman's stopper"
}