"unilinear evolution" meaning in English

{
  "forms": [
    {
      "form": "unilinear evolutions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {
        "1": "-",
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      "expansion": "unilinear evolution (usually uncountable, plural unilinear evolutions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "source": "w"
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      "examples": [
        {
          "ref": "2003, William M. Dugger, Howard J. Sherman, editors, Evolutionary Theory in the Social Sciences […] , Taylor & Francis, →ISBN, page 156:",
          "text": "First, unilinear evolution, the classical nineteenth-century formulation, dealt with particular cultures, placing them in stages of a universal sequence.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of unilineal evolution"
      ],
      "id": "en-unilinear_evolution-en-noun-VjSoyJP-",
      "links": [
        [
          "unilineal evolution",
          "unilineal evolution#English"
        ]
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      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "unilineal evolution"
        }
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "word": "unilinear evolution"
}

{
  "forms": [
    {
      "form": "unilinear evolutions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "+"
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      "expansion": "unilinear evolution (usually uncountable, plural unilinear evolutions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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      "examples": [
        {
          "ref": "2003, William M. Dugger, Howard J. Sherman, editors, Evolutionary Theory in the Social Sciences […] , Taylor & Francis, →ISBN, page 156:",
          "text": "First, unilinear evolution, the classical nineteenth-century formulation, dealt with particular cultures, placing them in stages of a universal sequence.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of unilineal evolution"
      ],
      "links": [
        [
          "unilineal evolution",
          "unilineal evolution#English"
        ]
      ],
      "synonyms": [
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          "word": "unilineal evolution"
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      "tags": [
        "uncountable",
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  ],
  "word": "unilinear evolution"
}