"spawning ground" meaning in English

{
  "forms": [
    {
      "form": "spawning grounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spawning ground (plural spawning grounds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A zone in a riverbed or lake where fish breed and lay eggs."
      ],
      "id": "en-spawning_ground-en-noun-H8RT5njH",
      "translations": [
        {
          "code": "ca",
          "lang": "Catalan",
          "sense": "water zone for fish",
          "tags": [
            "masculine"
          ],
          "word": "fres"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "water zone for fish",
          "word": "kutualue"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "water zone for fish",
          "tags": [
            "masculine"
          ],
          "word": "Laichgrund"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "water zone for fish",
          "tags": [
            "feminine"
          ],
          "word": "zona de desove"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈspɑːˌninɡ ɡɹaʊndz/"
    }
  ],
  "word": "spawning ground"
}

{
  "forms": [
    {
      "form": "spawning grounds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spawning ground (plural spawning grounds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with IPA pronunciation"
      ],
      "glosses": [
        "A zone in a riverbed or lake where fish breed and lay eggs."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈspɑːˌninɡ ɡɹaʊndz/"
    }
  ],
  "translations": [
    {
      "code": "ca",
      "lang": "Catalan",
      "sense": "water zone for fish",
      "tags": [
        "masculine"
      ],
      "word": "fres"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "water zone for fish",
      "word": "kutualue"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "water zone for fish",
      "tags": [
        "masculine"
      ],
      "word": "Laichgrund"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "water zone for fish",
      "tags": [
        "feminine"
      ],
      "word": "zona de desove"
    }
  ],
  "word": "spawning ground"
}