"opera glass" meaning in English

{
  "forms": [
    {
      "form": "opera glasses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "opera glass (plural opera glasses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1844, Edgar Allan Poe, The Spectacles",
          "text": "Talbot,\" I said, \" you have an opera glass. Let me have it.\" \"An opera glass ! — no ! — what do you suppose I would be doing with an opera glass ?",
          "type": "quotation"
        },
        {
          "ref": "1914, John Robert Kippax, The Call of the Stars, page 93",
          "text": "To the north and east of Shaula and Lesuth, the twin stars in the uplifted sting, are two beautiful star clusters, about four degrees apart, known as 6 M. and 7 M. which can be very well seen with an opera glass.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A pair of small low-powered binoculars for use at a theatrical performance."
      ],
      "id": "en-opera_glass-en-noun-44D-78Tr"
    }
  ],
  "word": "opera glass"
}

{
  "forms": [
    {
      "form": "opera glasses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "opera glass (plural opera glasses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1844, Edgar Allan Poe, The Spectacles",
          "text": "Talbot,\" I said, \" you have an opera glass. Let me have it.\" \"An opera glass ! — no ! — what do you suppose I would be doing with an opera glass ?",
          "type": "quotation"
        },
        {
          "ref": "1914, John Robert Kippax, The Call of the Stars, page 93",
          "text": "To the north and east of Shaula and Lesuth, the twin stars in the uplifted sting, are two beautiful star clusters, about four degrees apart, known as 6 M. and 7 M. which can be very well seen with an opera glass.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A pair of small low-powered binoculars for use at a theatrical performance."
      ]
    }
  ],
  "word": "opera glass"
}