"unthinning" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "thinning"
      },
      "expansion": "un- + thinning",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + thinning",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unthinning (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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 terms prefixed with un-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1993, Jane Gardam, William Trevor, Rose Tremain, Trio: Three Short Stories from Cheltenham, page 35",
          "text": "Looking down I found myself staring at the wiry and unthinning hair of Volumnia.",
          "type": "quotation"
        },
        {
          "ref": "2012, Les Murray, New Selected Poems",
          "text": "Bees hum their shift in unthinning mists of white\nbursaria blossom, under the noon of wattles.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Not becoming thin."
      ],
      "id": "en-unthinning-en-adj-KmPerh6V",
      "links": [
        [
          "thin",
          "thin"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "unthinning"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "thinning"
      },
      "expansion": "un- + thinning",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + thinning",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unthinning (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with un-",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1993, Jane Gardam, William Trevor, Rose Tremain, Trio: Three Short Stories from Cheltenham, page 35",
          "text": "Looking down I found myself staring at the wiry and unthinning hair of Volumnia.",
          "type": "quotation"
        },
        {
          "ref": "2012, Les Murray, New Selected Poems",
          "text": "Bees hum their shift in unthinning mists of white\nbursaria blossom, under the noon of wattles.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Not becoming thin."
      ],
      "links": [
        [
          "thin",
          "thin"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "unthinning"
}