"tứ dân" meaning in Vietnamese

{
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      "args": {
        "1": "vi",
        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "四",
        "2": "four",
        "3": "民",
        "4": "people"
      },
      "expansion": "Sino-Vietnamese word from 四 (“four”) and 民 (“people”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 四 (“four”) and 民 (“people”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "tứ dân",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "tứ dân",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
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        {
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          "parents": [],
          "source": "w"
        },
        {
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          "parents": [],
          "source": "w"
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          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Four",
          "orig": "vi:Four",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "People",
          "orig": "vi:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Meronyms: công (“artisans/craftsmen”), nông (“peasants/farmers”), sĩ (“intelligentsia/intellectuals”), thương (“merchants”)"
        }
      ],
      "glosses": [
        "the four hierarchical tầng lớp (“social groups”) in feudal East Asia"
      ],
      "id": "en-tứ_dân-vi-noun-N87sfn~g",
      "links": [
        [
          "tầng lớp",
          "tầng lớp#Vietnamese"
        ]
      ],
      "raw_glosses": [
        "(historical, collective) the four hierarchical tầng lớp (“social groups”) in feudal East Asia"
      ],
      "tags": [
        "collective",
        "historical"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[tɨ˧˦ zən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[tɨ˨˩˦ jəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[tɨ˦˥ jəŋ˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-tứ dân.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f9/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-t%E1%BB%A9_d%C3%A2n.wav/LL-Q9199_%28vie%29-Penn_Zero_MSSJ-t%E1%BB%A9_d%C3%A2n.wav.mp3",
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    }
  ],
  "word": "tứ dân"
}

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      "args": {
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        "2": "Sino-Vietnamese words"
      },
      "expansion": "",
      "name": "categorize"
    },
    {
      "args": {
        "1": "四",
        "2": "four",
        "3": "民",
        "4": "people"
      },
      "expansion": "Sino-Vietnamese word from 四 (“four”) and 民 (“people”)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "Sino-Vietnamese word from 四 (“four”) and 民 (“people”).",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "tứ dân",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "tứ dân",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
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        "Sino-Vietnamese words",
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        "Vietnamese collective nouns",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese nouns",
        "Vietnamese terms with IPA pronunciation",
        "Vietnamese terms with historical senses",
        "vi:Four",
        "vi:People"
      ],
      "examples": [
        {
          "text": "Meronyms: công (“artisans/craftsmen”), nông (“peasants/farmers”), sĩ (“intelligentsia/intellectuals”), thương (“merchants”)"
        }
      ],
      "glosses": [
        "the four hierarchical tầng lớp (“social groups”) in feudal East Asia"
      ],
      "links": [
        [
          "tầng lớp",
          "tầng lớp#Vietnamese"
        ]
      ],
      "raw_glosses": [
        "(historical, collective) the four hierarchical tầng lớp (“social groups”) in feudal East Asia"
      ],
      "tags": [
        "collective",
        "historical"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[tɨ˧˦ zən˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[tɨ˨˩˦ jəŋ˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[tɨ˦˥ jəŋ˧˧]",
      "note": "Saigon"
    },
    {
      "audio": "LL-Q9199 (vie)-Penn Zero MSSJ-tứ dân.wav",
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    }
  ],
  "word": "tứ dân"
}