"duty calls" meaning in English

{
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      "expansion": "duty calls",
      "name": "head"
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
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      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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      ],
      "examples": [
        {
          "text": "Excuse me, gentlemen, but I'm afraid duty calls.",
          "type": "example"
        }
      ],
      "glosses": [
        "Expresses that the speaker must go and deal with something."
      ],
      "id": "en-duty_calls-en-phrase-bjBCof7R",
      "raw_glosses": [
        "(idiomatic) Expresses that the speaker must go and deal with something."
      ],
      "related": [
        {
          "word": "call of duty"
        },
        {
          "word": "nature calls"
        }
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "expresses that the speaker has something they must do",
          "word": "de plicht roept"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "expresses that the speaker has something they must do",
          "word": "velvollisuus kutsuu"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "expresses that the speaker has something they must do",
          "word": "le devoir m’appelle"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "expresses that the speaker has something they must do",
          "word": "die Pflicht ruft"
        },
        {
          "code": "km",
          "lang": "Khmer",
          "roman": "méanrôvlô",
          "sense": "expresses that the speaker has something they must do",
          "word": "មានរវល់"
        },
        {
          "code": "km",
          "lang": "Khmer",
          "roman": "chéabrôvôl",
          "sense": "expresses that the speaker has something they must do",
          "word": "ជាប់រវល់"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "expresses that the speaker has something they must do",
          "word": "obowiązki wzywają"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-duty calls.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e7/En-au-duty_calls.ogg/En-au-duty_calls.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e7/En-au-duty_calls.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "duty calls"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
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      "expansion": "duty calls",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "call of duty"
    },
    {
      "word": "nature calls"
    }
  ],
  "senses": [
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        "English terms with audio links",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "Excuse me, gentlemen, but I'm afraid duty calls.",
          "type": "example"
        }
      ],
      "glosses": [
        "Expresses that the speaker must go and deal with something."
      ],
      "raw_glosses": [
        "(idiomatic) Expresses that the speaker must go and deal with something."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-duty calls.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e7/En-au-duty_calls.ogg/En-au-duty_calls.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e7/En-au-duty_calls.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "expresses that the speaker has something they must do",
      "word": "de plicht roept"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "expresses that the speaker has something they must do",
      "word": "velvollisuus kutsuu"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "expresses that the speaker has something they must do",
      "word": "le devoir m’appelle"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "expresses that the speaker has something they must do",
      "word": "die Pflicht ruft"
    },
    {
      "code": "km",
      "lang": "Khmer",
      "roman": "méanrôvlô",
      "sense": "expresses that the speaker has something they must do",
      "word": "មានរវល់"
    },
    {
      "code": "km",
      "lang": "Khmer",
      "roman": "chéabrôvôl",
      "sense": "expresses that the speaker has something they must do",
      "word": "ជាប់រវល់"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "expresses that the speaker has something they must do",
      "word": "obowiązki wzywają"
    }
  ],
  "word": "duty calls"
}