"open shop" meaning in English

{
  "forms": [
    {
      "form": "open shops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "open shop (plural open shops)",
      "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"
        }
      ],
      "coordinate_terms": [
        {
          "sense": "place of employment in which union bargains for and receives dues even those not in the union",
          "word": "closed shop"
        },
        {
          "sense": "place of employment in which union bargains for and receives dues even those not in the union",
          "word": "agency shop"
        },
        {
          "sense": "place of employment in which union bargains for and receives dues even those not in the union",
          "word": "union shop"
        }
      ],
      "derived": [
        {
          "word": "open-shopper"
        }
      ],
      "glosses": [
        "A place of employment in which employment is in no way contingent on membership in a union, though a union may be the exclusive bargaining agent of the employees."
      ],
      "id": "en-open_shop-en-noun-HZy5NC-E",
      "links": [
        [
          "employment",
          "employment"
        ],
        [
          "contingent",
          "contingent"
        ],
        [
          "membership",
          "membership"
        ],
        [
          "union",
          "union"
        ]
      ]
    }
  ],
  "word": "open shop"
}

{
  "coordinate_terms": [
    {
      "sense": "place of employment in which union bargains for and receives dues even those not in the union",
      "word": "closed shop"
    },
    {
      "sense": "place of employment in which union bargains for and receives dues even those not in the union",
      "word": "agency shop"
    },
    {
      "sense": "place of employment in which union bargains for and receives dues even those not in the union",
      "word": "union shop"
    }
  ],
  "derived": [
    {
      "word": "open-shopper"
    }
  ],
  "forms": [
    {
      "form": "open shops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "open shop (plural open shops)",
      "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"
      ],
      "glosses": [
        "A place of employment in which employment is in no way contingent on membership in a union, though a union may be the exclusive bargaining agent of the employees."
      ],
      "links": [
        [
          "employment",
          "employment"
        ],
        [
          "contingent",
          "contingent"
        ],
        [
          "membership",
          "membership"
        ],
        [
          "union",
          "union"
        ]
      ]
    }
  ],
  "word": "open shop"
}