"нэгэн" meaning in Mongolian

{
  "forms": [
    {
      "form": "negen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ᠨᠢᠭᠡᠨ",
      "roman": "nigen",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ᠨᠢᠭᠡᠨ"
      },
      "expansion": "нэгэн • (negen) (Mongolian spelling ᠨᠢᠭᠡᠨ (nigen))",
      "name": "mn-numeral-form"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mongolian entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mongolian terms with redundant script codes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "neg",
          "word": "нэг"
        }
      ],
      "glosses": [
        "oblique of нэг (neg)"
      ],
      "id": "en-нэгэн-mn-num-QS6w9UYB",
      "links": [
        [
          "нэг",
          "нэг#Mongolian"
        ]
      ],
      "tags": [
        "form-of",
        "oblique"
      ]
    }
  ],
  "word": "нэгэн"
}

{
  "forms": [
    {
      "form": "negen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ᠨᠢᠭᠡᠨ",
      "roman": "nigen",
      "tags": [
        "Mongolian"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ᠨᠢᠭᠡᠨ"
      },
      "expansion": "нэгэн • (negen) (Mongolian spelling ᠨᠢᠭᠡᠨ (nigen))",
      "name": "mn-numeral-form"
    }
  ],
  "lang": "Mongolian",
  "lang_code": "mn",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Mongolian 2-syllable words",
        "Mongolian entries with incorrect language header",
        "Mongolian non-lemma forms",
        "Mongolian numeral forms",
        "Mongolian palindromes",
        "Mongolian terms with redundant script codes",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "extra": "neg",
          "word": "нэг"
        }
      ],
      "glosses": [
        "oblique of нэг (neg)"
      ],
      "links": [
        [
          "нэг",
          "нэг#Mongolian"
        ]
      ],
      "tags": [
        "form-of",
        "oblique"
      ]
    }
  ],
  "word": "нэгэн"
}