"leg day" meaning in English

{
  "forms": [
    {
      "form": "leg days",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "leg day (plural leg days)",
      "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"
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          "source": "w"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "arm day"
        },
        {
          "word": "back day"
        },
        {
          "word": "brain day"
        },
        {
          "word": "cardio day"
        },
        {
          "word": "chest day"
        },
        {
          "word": "core day"
        },
        {
          "word": "full-body day"
        },
        {
          "word": "lower body day"
        },
        {
          "word": "neck day"
        },
        {
          "word": "rest day"
        },
        {
          "word": "total body day"
        },
        {
          "word": "upper body day"
        }
      ],
      "examples": [
        {
          "text": "Don't skip leg day.",
          "type": "example"
        },
        {
          "text": "Holonym: split"
        },
        {
          "text": "6 August 2015, \"Leg Day\", Teen Titans Go!\nRAVEN: I worked on my upper body yesterday. Today is leg day.",
          "type": "quotation"
        },
        {
          "text": "7 July 2017, Melanie Scrofano, \"Let's Pretend We're Strangers\", Wynonna Earp\nI will shoot every beak-billed leg-day-loving last one of you.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A day dedicated to leg exercises."
      ],
      "id": "en-leg_day-en-noun--ncpDSRD",
      "links": [
        [
          "exercise",
          "exercise"
        ]
      ],
      "related": [
        {
          "word": "chicken leg"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "LL-Q1860 (eng)-Flame, not lame-leg day.wav",
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    }
  ],
  "word": "leg day"
}

{
  "coordinate_terms": [
    {
      "word": "arm day"
    },
    {
      "word": "back day"
    },
    {
      "word": "brain day"
    },
    {
      "word": "cardio day"
    },
    {
      "word": "chest day"
    },
    {
      "word": "core day"
    },
    {
      "word": "full-body day"
    },
    {
      "word": "lower body day"
    },
    {
      "word": "neck day"
    },
    {
      "word": "rest day"
    },
    {
      "word": "total body day"
    },
    {
      "word": "upper body day"
    }
  ],
  "forms": [
    {
      "form": "leg days",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "leg day (plural leg days)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "chicken leg"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English terms with usage examples",
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        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Don't skip leg day.",
          "type": "example"
        },
        {
          "text": "Holonym: split"
        },
        {
          "text": "6 August 2015, \"Leg Day\", Teen Titans Go!\nRAVEN: I worked on my upper body yesterday. Today is leg day.",
          "type": "quotation"
        },
        {
          "text": "7 July 2017, Melanie Scrofano, \"Let's Pretend We're Strangers\", Wynonna Earp\nI will shoot every beak-billed leg-day-loving last one of you.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A day dedicated to leg exercises."
      ],
      "links": [
        [
          "exercise",
          "exercise"
        ]
      ]
    }
  ],
  "sounds": [
    {
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      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/7/7f/LL-Q1860_%28eng%29-Flame%2C_not_lame-leg_day.wav/LL-Q1860_%28eng%29-Flame%2C_not_lame-leg_day.wav.mp3",
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    }
  ],
  "word": "leg day"
}