"old-growth" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "old-growth (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"
        }
      ],
      "examples": [
        {
          "ref": "2005, Sean Dooley, The Big Twitch, Sydney: Allen and Unwin, page 240",
          "text": "While on a walk the next morning I found what looked like a patch of old growth habitat - perhaps somewhere the fires had missed - and to my astonishment saw a female Red-lored Whistler accompanied by an immature.",
          "type": "quotation"
        },
        {
          "ref": "2012, John Branch, “Snow Fall : The Avalanche at Tunnel Creek”, in New York Time",
          "text": "Moving about 70 miles per hour, it crashed through the sturdy old-growth trees, snapping their limbs and shredding bark from their trunks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "From, in, or pertaining to, an old-growth forest; having mature trees or other plants."
      ],
      "id": "en-old-growth-en-adj-ZOQ9PHdG",
      "links": [
        [
          "old-growth forest",
          "old-growth forest"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "old-growth"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "old-growth (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 multiword terms",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "2005, Sean Dooley, The Big Twitch, Sydney: Allen and Unwin, page 240",
          "text": "While on a walk the next morning I found what looked like a patch of old growth habitat - perhaps somewhere the fires had missed - and to my astonishment saw a female Red-lored Whistler accompanied by an immature.",
          "type": "quotation"
        },
        {
          "ref": "2012, John Branch, “Snow Fall : The Avalanche at Tunnel Creek”, in New York Time",
          "text": "Moving about 70 miles per hour, it crashed through the sturdy old-growth trees, snapping their limbs and shredding bark from their trunks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "From, in, or pertaining to, an old-growth forest; having mature trees or other plants."
      ],
      "links": [
        [
          "old-growth forest",
          "old-growth forest"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "old-growth"
}