"13th Gen" meaning in English

{
  "etymology_text": "Coined by William Strauss and Neil Howe, from being the 13th generation since American independence according to their analysis of generational cycles in the US (Strauss-Howe generational theory).",
  "head_templates": [
    {
      "args": {},
      "expansion": "13th Gen",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Age",
          "orig": "en:Age",
          "parents": [
            "Human",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Collectives",
          "orig": "en:Collectives",
          "parents": [
            "Miscellaneous",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Generations",
          "orig": "en:Generations",
          "parents": [
            "Age",
            "Collectives",
            "Demography",
            "People",
            "Sociology",
            "Human",
            "Time",
            "Miscellaneous",
            "Sciences",
            "Statistics",
            "Social sciences",
            "All topics",
            "Formal sciences",
            "Mathematics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of Generation X"
      ],
      "id": "en-13th_Gen-en-name-CHyEuNb5",
      "links": [
        [
          "Generation X",
          "Generation X#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Synonym of Generation X"
      ],
      "related": [
        {
          "word": "13er"
        },
        {
          "word": "thirteener"
        }
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Generation X"
        }
      ],
      "tags": [
        "dated"
      ],
      "wikipedia": [
        "Neil Howe",
        "William Strauss"
      ]
    }
  ],
  "word": "13th Gen"
}

{
  "etymology_text": "Coined by William Strauss and Neil Howe, from being the 13th generation since American independence according to their analysis of generational cycles in the US (Strauss-Howe generational theory).",
  "head_templates": [
    {
      "args": {},
      "expansion": "13th Gen",
      "name": "en-proper-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "13er"
    },
    {
      "word": "thirteener"
    }
  ],
  "senses": [
    {
      "categories": [
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms spelled with numbers",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Age",
        "en:Collectives",
        "en:Generations"
      ],
      "glosses": [
        "Synonym of Generation X"
      ],
      "links": [
        [
          "Generation X",
          "Generation X#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Synonym of Generation X"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "Generation X"
        }
      ],
      "tags": [
        "dated"
      ],
      "wikipedia": [
        "Neil Howe",
        "William Strauss"
      ]
    }
  ],
  "word": "13th Gen"
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <timeline> - omitted",
  "path": [
    "13th Gen",
    "Template:timeline:generations",
    "#tag",
    "#tag"
  ],
  "section": "English",
  "subsection": "proper noun",
  "title": "13th Gen",
  "trace": ""
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <timeline> - omitted",
  "path": [
    "13th Gen",
    "Template:timeline:generations",
    "#tag",
    "#tag"
  ],
  "section": "English",
  "subsection": "proper noun",
  "title": "13th Gen",
  "trace": ""
}