"circle pit" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de circle (« cercle ») et de pit (« zone de pogo (mosh pit) »)."
  ],
  "forms": [
    {
      "form": "circle pits",
      "tags": [
        "plural"
      ]
    }
  ],
  "holonyms": [
    {
      "word": "mosh"
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "translation": "mur de la mort",
      "word": "wall of death"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de la danse",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en anglais du metal",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Figure de danse consistant, lors d'un concert, à courir en cercle à proximité de la scène."
      ],
      "id": "fr-circle_pit-en-noun-EJzRQcPd",
      "raw_tags": [
        "Metal"
      ],
      "topics": [
        "dance"
      ]
    }
  ],
  "word": "circle pit"
}

{
  "categories": [
    "Compositions en anglais",
    "Locutions nominales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de circle (« cercle ») et de pit (« zone de pogo (mosh pit) »)."
  ],
  "forms": [
    {
      "form": "circle pits",
      "tags": [
        "plural"
      ]
    }
  ],
  "holonyms": [
    {
      "word": "mosh"
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "translation": "mur de la mort",
      "word": "wall of death"
    }
  ],
  "senses": [
    {
      "categories": [
        "Lexique en anglais de la danse",
        "Lexique en anglais du metal",
        "Wiktionnaire:Exemples manquants en anglais"
      ],
      "glosses": [
        "Figure de danse consistant, lors d'un concert, à courir en cercle à proximité de la scène."
      ],
      "raw_tags": [
        "Metal"
      ],
      "topics": [
        "dance"
      ]
    }
  ],
  "word": "circle pit"
}