"third position" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "third position (uncountable)",
      "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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ballet",
          "orig": "en:Ballet",
          "parents": [
            "Dance",
            "Art",
            "Recreation",
            "Culture",
            "Human activity",
            "Society",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A position in which one foot is placed in front of the other so that the heel of the front foot is near the arch of the rear foot."
      ],
      "id": "en-third_position-en-noun-Gwny6Ixn",
      "links": [
        [
          "ballet",
          "ballet"
        ]
      ],
      "qualifier": "ballet",
      "raw_glosses": [
        "(ballet) A position in which one foot is placed in front of the other so that the heel of the front foot is near the arch of the rear foot."
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "third position"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "third position (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "en:Ballet"
      ],
      "glosses": [
        "A position in which one foot is placed in front of the other so that the heel of the front foot is near the arch of the rear foot."
      ],
      "links": [
        [
          "ballet",
          "ballet"
        ]
      ],
      "qualifier": "ballet",
      "raw_glosses": [
        "(ballet) A position in which one foot is placed in front of the other so that the heel of the front foot is near the arch of the rear foot."
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "third position"
}