"affinity group" meaning in English

{
  "forms": [
    {
      "form": "affinity groups",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "affinity group (plural affinity groups)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2023 July 10, James Poniewozik, “The Twitter Watch Party Is Over”, in The New York Times",
          "text": "But in my corner of the app — the fans and critics who gathered to riff on TV and the real-life events that filtered through it — it feels like the end of an era. Even the finale of “Succession,” a big deal among my affinity group of TV junkies and media obsessives, felt like a trickle next to the big tweetwatches of the 2010s.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A group of people formed around a shared interest or common goal, to which individuals formally or informally belong."
      ],
      "id": "en-affinity_group-en-noun-4q16l1v5",
      "links": [
        [
          "group",
          "group"
        ],
        [
          "interest",
          "interest"
        ],
        [
          "goal",
          "goal"
        ],
        [
          "individual",
          "individual"
        ],
        [
          "formally",
          "formally"
        ],
        [
          "informally",
          "informally"
        ]
      ]
    }
  ],
  "word": "affinity group"
}

{
  "forms": [
    {
      "form": "affinity groups",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "affinity group (plural affinity groups)",
      "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",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2023 July 10, James Poniewozik, “The Twitter Watch Party Is Over”, in The New York Times",
          "text": "But in my corner of the app — the fans and critics who gathered to riff on TV and the real-life events that filtered through it — it feels like the end of an era. Even the finale of “Succession,” a big deal among my affinity group of TV junkies and media obsessives, felt like a trickle next to the big tweetwatches of the 2010s.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A group of people formed around a shared interest or common goal, to which individuals formally or informally belong."
      ],
      "links": [
        [
          "group",
          "group"
        ],
        [
          "interest",
          "interest"
        ],
        [
          "goal",
          "goal"
        ],
        [
          "individual",
          "individual"
        ],
        [
          "formally",
          "formally"
        ],
        [
          "informally",
          "informally"
        ]
      ]
    }
  ],
  "word": "affinity group"
}