"2.4 children" meaning in English

{
  "etymology_text": "From what was once the average (and therefore supposedly typical) number of children per household in the United Kingdom.",
  "head_templates": [
    {
      "args": {
        "1": "p",
        "head": "2.4 children"
      },
      "expansion": "2.4 children pl (plural only)",
      "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 pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Family",
          "orig": "en:Family",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "United Kingdom",
          "orig": "en:United Kingdom",
          "parents": [
            "British Isles",
            "Europe",
            "Islands",
            "Earth",
            "Eurasia",
            "Places",
            "Nature",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1993, Carl F. George, How to Break Growth Barriers: Capturing Overlooked Opportunities for Church Growth, Baker Books, →ISBN:",
          "text": "Maybe their pastoral family, with their 2.4 children, is at the perfect age and life stage for that church, and yours does not seem to be (or vice versa).",
          "type": "quote"
        },
        {
          "ref": "2013, Jackie Highe, The Modern Grandparents' Guide, Hachette UK, →ISBN:",
          "text": "In the 1960s and 1970s it was normal to marry and have babies at a young age – girls were routinely leaving school at sixteen, marrying at eighteen and having their 2.4 children before their twenty-third birthday..",
          "type": "quote"
        },
        {
          "ref": "2015, Kerry O'Halloran, The Politics of Adoption: International Perspectives on Law, Policy and Practice, Springer, →ISBN, page 821:",
          "text": "The heterosexual, monogamous, married for life couple, exclusively committed to the upbringing of their 2.4 children, was the family unit that adoption was legally designed to replicate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stereotypical characteristic of normal family life; frequently used ironically."
      ],
      "id": "en-2.4_children-en-noun-o6vI0uPw",
      "related": [
        {
          "english": "the American equivalent",
          "word": "2.5 kids"
        }
      ],
      "tags": [
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "2.4 children"
}

{
  "etymology_text": "From what was once the average (and therefore supposedly typical) number of children per household in the United Kingdom.",
  "head_templates": [
    {
      "args": {
        "1": "p",
        "head": "2.4 children"
      },
      "expansion": "2.4 children pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "english": "the American equivalent",
      "word": "2.5 kids"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English pluralia tantum",
        "English terms spelled with .",
        "English terms spelled with numbers",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Family",
        "en:United Kingdom"
      ],
      "examples": [
        {
          "ref": "1993, Carl F. George, How to Break Growth Barriers: Capturing Overlooked Opportunities for Church Growth, Baker Books, →ISBN:",
          "text": "Maybe their pastoral family, with their 2.4 children, is at the perfect age and life stage for that church, and yours does not seem to be (or vice versa).",
          "type": "quote"
        },
        {
          "ref": "2013, Jackie Highe, The Modern Grandparents' Guide, Hachette UK, →ISBN:",
          "text": "In the 1960s and 1970s it was normal to marry and have babies at a young age – girls were routinely leaving school at sixteen, marrying at eighteen and having their 2.4 children before their twenty-third birthday..",
          "type": "quote"
        },
        {
          "ref": "2015, Kerry O'Halloran, The Politics of Adoption: International Perspectives on Law, Policy and Practice, Springer, →ISBN, page 821:",
          "text": "The heterosexual, monogamous, married for life couple, exclusively committed to the upbringing of their 2.4 children, was the family unit that adoption was legally designed to replicate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stereotypical characteristic of normal family life; frequently used ironically."
      ],
      "tags": [
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "2.4 children"
}