"COOP" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "COOP",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cross-origin opener policy"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Internet",
          "orig": "en:Internet",
          "parents": [
            "Computing",
            "Networking",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of cross-origin opener policy."
      ],
      "id": "en-COOP-en-noun-z6gImstS",
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "cross-origin",
          "cross-origin#English"
        ],
        [
          "opener",
          "opener#English"
        ],
        [
          "policy",
          "policy#English"
        ]
      ],
      "qualifier": "Web",
      "raw_glosses": [
        "(Internet, Web) Initialism of cross-origin opener policy."
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "COOP"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "COOP",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cross-origin opener policy"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "Pages with 1 entry",
        "en:Internet"
      ],
      "glosses": [
        "Initialism of cross-origin opener policy."
      ],
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "cross-origin",
          "cross-origin#English"
        ],
        [
          "opener",
          "opener#English"
        ],
        [
          "policy",
          "policy#English"
        ]
      ],
      "qualifier": "Web",
      "raw_glosses": [
        "(Internet, Web) Initialism of cross-origin opener policy."
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "COOP"
}