"tumbling mat" meaning in English

{
  "forms": [
    {
      "form": "tumbling mats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tumbling mat (plural tumbling mats)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "source": "w"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Gymnastics",
          "orig": "en:Gymnastics",
          "parents": [
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
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          "source": "w"
        }
      ],
      "glosses": [
        "A padded mat used in gymnastics."
      ],
      "id": "en-tumbling_mat-en-noun-F2lt4gW3",
      "links": [
        [
          "gymnastics",
          "gymnastics"
        ],
        [
          "padded",
          "padded"
        ],
        [
          "mat",
          "mat"
        ]
      ],
      "raw_glosses": [
        "(gymnastics) A padded mat used in gymnastics."
      ],
      "topics": [
        "gymnastics",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "tumbling mat"
}

{
  "forms": [
    {
      "form": "tumbling mats",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tumbling mat (plural tumbling mats)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English multiword terms",
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        "en:Gymnastics"
      ],
      "glosses": [
        "A padded mat used in gymnastics."
      ],
      "links": [
        [
          "gymnastics",
          "gymnastics"
        ],
        [
          "padded",
          "padded"
        ],
        [
          "mat",
          "mat"
        ]
      ],
      "raw_glosses": [
        "(gymnastics) A padded mat used in gymnastics."
      ],
      "topics": [
        "gymnastics",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    }
  ],
  "word": "tumbling mat"
}