"pierre sèche" meaning in French

{
  "forms": [
    {
      "form": "pierres sèches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "pierre sèche f (plural pierres sèches)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French 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"
        }
      ],
      "glosses": [
        "dry-stone"
      ],
      "id": "en-pierre_sèche-fr-noun-Drmhac0o",
      "links": [
        [
          "dry-stone",
          "dry-stone"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) dry-stone"
      ],
      "tags": [
        "feminine",
        "plural-normally"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pjɛʁ sɛʃ/"
    }
  ],
  "word": "pierre sèche"
}

{
  "forms": [
    {
      "form": "pierres sèches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "pierre sèche f (plural pierres sèches)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "dry-stone"
      ],
      "links": [
        [
          "dry-stone",
          "dry-stone"
        ]
      ],
      "raw_glosses": [
        "(usually in the plural) dry-stone"
      ],
      "tags": [
        "feminine",
        "plural-normally"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pjɛʁ sɛʃ/"
    }
  ],
  "word": "pierre sèche"
}