"ЕР" meaning in Russian

{
  "forms": [
    {
      "form": "JeR",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in",
        "3": "-"
      },
      "expansion": "ЕР • (JeR) m inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Jedínaja Rossíja, “United Russia, a Russian political party”",
          "word": "Еди́ная Росси́я"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ru",
          "name": "Conservatism",
          "orig": "ru:Conservatism",
          "parents": [
            "Ideologies",
            "Politics",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ru",
          "name": "Politics",
          "orig": "ru:Politics",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ru",
          "name": "Russian politics",
          "orig": "ru:Russian politics",
          "parents": [
            "Politics",
            "Russia",
            "Society",
            "Asia",
            "Europe",
            "All topics",
            "Earth",
            "Eurasia",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "roman": "PŽiV",
          "tags": [
            "derogatory",
            "slang"
          ],
          "word": "ПЖиВ"
        }
      ],
      "glosses": [
        "Initialism of Еди́ная Росси́я (Jedínaja Rossíja, “United Russia, a Russian political party”)"
      ],
      "id": "en-ЕР-ru-noun-8QJ8W3pL",
      "links": [
        [
          "politics",
          "politics"
        ],
        [
          "Еди́ная",
          "единый#Russian"
        ],
        [
          "Росси́я",
          "Россия#Russian"
        ]
      ],
      "raw_glosses": [
        "(politics) Initialism of Еди́ная Росси́я (Jedínaja Rossíja, “United Russia, a Russian political party”)"
      ],
      "related": [
        {
          "roman": "jedinoróss",
          "tags": [
            "derogatory",
            "slang"
          ],
          "word": "единоро́сс"
        },
        {
          "roman": "jedorást",
          "tags": [
            "derogatory",
            "slang"
          ],
          "word": "едора́ст"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "initialism"
      ],
      "topics": [
        "government",
        "politics"
      ]
    }
  ],
  "word": "ЕР"
}

{
  "coordinate_terms": [
    {
      "roman": "PŽiV",
      "tags": [
        "derogatory",
        "slang"
      ],
      "word": "ПЖиВ"
    }
  ],
  "forms": [
    {
      "form": "JeR",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "",
        "2": "m-in",
        "3": "-"
      },
      "expansion": "ЕР • (JeR) m inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "related": [
    {
      "roman": "jedinoróss",
      "tags": [
        "derogatory",
        "slang"
      ],
      "word": "единоро́сс"
    },
    {
      "roman": "jedorást",
      "tags": [
        "derogatory",
        "slang"
      ],
      "word": "едора́ст"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Jedínaja Rossíja, “United Russia, a Russian political party”",
          "word": "Еди́ная Росси́я"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Russian entries with incorrect language header",
        "Russian inanimate nouns",
        "Russian indeclinable nouns",
        "Russian initialisms",
        "Russian lemmas",
        "Russian masculine nouns",
        "Russian nouns",
        "Russian terms with redundant head parameter",
        "ru:Conservatism",
        "ru:Politics",
        "ru:Russian politics"
      ],
      "glosses": [
        "Initialism of Еди́ная Росси́я (Jedínaja Rossíja, “United Russia, a Russian political party”)"
      ],
      "links": [
        [
          "politics",
          "politics"
        ],
        [
          "Еди́ная",
          "единый#Russian"
        ],
        [
          "Росси́я",
          "Россия#Russian"
        ]
      ],
      "raw_glosses": [
        "(politics) Initialism of Еди́ная Росси́я (Jedínaja Rossíja, “United Russia, a Russian political party”)"
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "indeclinable",
        "initialism"
      ],
      "topics": [
        "government",
        "politics"
      ]
    }
  ],
  "word": "ЕР"
}