"Eser" meaning in English

{
  "etymology_links": [
    [
      "эсе́р",
      "эсер#Russian"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ru",
        "3": "эсе́р"
      },
      "expansion": "Russian эсе́р (esér)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Russian эсе́р (esér).",
  "forms": [
    {
      "form": "Esers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Eser (plural Esers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A Socialist Revolutionary."
      ],
      "id": "en-Eser-en-noun-AHeyDzUN",
      "links": [
        [
          "Socialist Revolutionary",
          "Socialist Revolutionary"
        ]
      ],
      "raw_glosses": [
        "(historical) A Socialist Revolutionary."
      ],
      "synonyms": [
        {
          "word": "SR"
        }
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "word": "Eser"
}

{
  "etymology_links": [
    [
      "эсе́р",
      "эсер#Russian"
    ]
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ru",
        "3": "эсе́р"
      },
      "expansion": "Russian эсе́р (esér)",
      "name": "bor"
    }
  ],
  "etymology_text": "From Russian эсе́р (esér).",
  "forms": [
    {
      "form": "Esers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Eser (plural Esers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms borrowed from Russian",
        "English terms derived from Russian",
        "English terms with historical senses",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "glosses": [
        "A Socialist Revolutionary."
      ],
      "links": [
        [
          "Socialist Revolutionary",
          "Socialist Revolutionary"
        ]
      ],
      "raw_glosses": [
        "(historical) A Socialist Revolutionary."
      ],
      "synonyms": [
        {
          "word": "SR"
        }
      ],
      "tags": [
        "historical"
      ]
    }
  ],
  "word": "Eser"
}