"Dunbar's number" meaning in English

{
  "etymology_text": "Proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Dunbar's number",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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 entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020, Michael Wooldridge, The Road to Conscious Machines: The Story of AI, Penguin UK",
          "text": "Dunbar's number might have remained a curiosity but for the fact that subsequent research found that this number has arisen repeatedly, across the planet, in terms of actual human social group sizes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A suggested cognitive limit to the number of people with whom one can maintain stable social relationships. It has been proposed to lie between 100 and 250, with a commonly used value of 150."
      ],
      "id": "en-Dunbar's_number-en-name-BOfP6UVv",
      "links": [
        [
          "cognitive",
          "cognitive"
        ],
        [
          "limit",
          "limit"
        ],
        [
          "stable",
          "stable"
        ],
        [
          "social",
          "social"
        ],
        [
          "relationship",
          "relationship"
        ]
      ],
      "synonyms": [
        {
          "word": "Dunbar number"
        }
      ],
      "wikipedia": [
        "Dunbar's number",
        "Robin Dunbar"
      ]
    }
  ],
  "word": "Dunbar's number"
}

{
  "etymology_text": "Proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Dunbar's number",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "2020, Michael Wooldridge, The Road to Conscious Machines: The Story of AI, Penguin UK",
          "text": "Dunbar's number might have remained a curiosity but for the fact that subsequent research found that this number has arisen repeatedly, across the planet, in terms of actual human social group sizes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A suggested cognitive limit to the number of people with whom one can maintain stable social relationships. It has been proposed to lie between 100 and 250, with a commonly used value of 150."
      ],
      "links": [
        [
          "cognitive",
          "cognitive"
        ],
        [
          "limit",
          "limit"
        ],
        [
          "stable",
          "stable"
        ],
        [
          "social",
          "social"
        ],
        [
          "relationship",
          "relationship"
        ]
      ],
      "wikipedia": [
        "Dunbar's number",
        "Robin Dunbar"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Dunbar number"
    }
  ],
  "word": "Dunbar's number"
}