"endless chain" meaning in English

{
  "forms": [
    {
      "form": "endless chains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "endless chain (plural endless chains)",
      "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": "English links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: endless belt"
        },
        {
          "text": "Meronym: master link"
        }
      ],
      "glosses": [
        "A chain having the ends joined to one another so as to form a continuous loop."
      ],
      "id": "en-endless_chain-en-noun-gxibvGl6",
      "links": [
        [
          "chain",
          "chain"
        ],
        [
          "join",
          "join"
        ],
        [
          "continuous",
          "continuous"
        ],
        [
          "loop",
          "loop"
        ]
      ],
      "related": [
        {
          "word": "endless loop"
        }
      ]
    }
  ],
  "word": "endless chain"
}

{
  "forms": [
    {
      "form": "endless chains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "endless chain (plural endless chains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "endless loop"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English links with redundant alt parameters",
        "English links with redundant wikilinks",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Coordinate term: endless belt"
        },
        {
          "text": "Meronym: master link"
        }
      ],
      "glosses": [
        "A chain having the ends joined to one another so as to form a continuous loop."
      ],
      "links": [
        [
          "chain",
          "chain"
        ],
        [
          "join",
          "join"
        ],
        [
          "continuous",
          "continuous"
        ],
        [
          "loop",
          "loop"
        ]
      ]
    }
  ],
  "word": "endless chain"
}